Replace != null with is not null

Emby.Dlna/ContentDirectory/ContentDirectoryService.cs

@@ -141,7 +141,7 @@ namespace Emby.Dlna.ContentDirectory
             {
                 var user = _userManager.GetUserById(Guid.Parse(profile.UserId));
 
-                if (user != null)
+                if (user is not null)
                 {
                     return user;
                 }
@@ -153,7 +153,7 @@ namespace Emby.Dlna.ContentDirectory
             {
                 var user = _userManager.GetUserById(Guid.Parse(userId));
 
-                if (user != null)
+                if (user is not null)
                 {
                     return user;
                 }

Emby.Dlna/ContentDirectory/ControlHandler.cs

@@ -1048,7 +1048,7 @@ namespace Emby.Dlna.ContentDirectory
                     ParentId = parent?.Id ?? Guid.Empty,
                     GroupItems = true
                 },
-                query.DtoOptions).Select(i => i.Item1 ?? i.Item2.FirstOrDefault()).Where(i => i != null).ToArray();
+                query.DtoOptions).Select(i => i.Item1 ?? i.Item2.FirstOrDefault()).Where(i => i is not null).ToArray();
 
             return ToResult(query.StartIndex, items);
         }

Emby.Dlna/Didl/DidlBuilder.cs

@@ -153,7 +153,7 @@ namespace Emby.Dlna.Didl
             writer.WriteAttributeString("restricted", "1");
             writer.WriteAttributeString("id", clientId);
 
-            if (context != null)
+            if (context is not null)
             {
                 writer.WriteAttributeString("parentID", GetClientId(context, contextStubType));
             }
@@ -652,7 +652,7 @@ namespace Emby.Dlna.Didl
             {
                 writer.WriteAttributeString("id", clientId);
 
-                if (context != null)
+                if (context is not null)
                 {
                     writer.WriteAttributeString("parentID", GetClientId(context, null));
                 }
@@ -701,7 +701,7 @@ namespace Emby.Dlna.Didl
             }
 
             var userdata = _userDataManager.GetUserData(user, item);
-            var playbackPositionTicks = (streamInfo != null && streamInfo.StartPositionTicks > 0) ? streamInfo.StartPositionTicks : userdata.PlaybackPositionTicks;
+            var playbackPositionTicks = (streamInfo is not null && streamInfo.StartPositionTicks > 0) ? streamInfo.StartPositionTicks : userdata.PlaybackPositionTicks;
 
             if (playbackPositionTicks > 0)
             {
@@ -916,7 +916,7 @@ namespace Emby.Dlna.Didl
                 }
             }
 
-            if (hasAlbumArtists != null)
+            if (hasAlbumArtists is not null)
             {
                 foreach (var albumArtist in hasAlbumArtists.AlbumArtists)
                 {
@@ -1093,7 +1093,7 @@ namespace Emby.Dlna.Didl
             if (item is Audio audioItem)
             {
                 var album = audioItem.AlbumEntity;
-                return album != null && album.HasImage(ImageType.Primary)
+                return album is not null && album.HasImage(ImageType.Primary)
                     ? GetImageInfo(album, ImageType.Primary)
                     : null;
             }
@@ -1106,7 +1106,7 @@ namespace Emby.Dlna.Didl
 
             // For other item types check parents, but be aware that image retrieved from a parent may be not suitable for this media item.
             var parentWithImage = GetFirstParentWithImageBelowUserRoot(item);
-            if (parentWithImage != null)
+            if (parentWithImage is not null)
             {
                 return GetImageInfo(parentWithImage, ImageType.Primary);
             }

Emby.Dlna/DlnaManager.cs

@@ -105,7 +105,7 @@ namespace Emby.Dlna
             ArgumentNullException.ThrowIfNull(deviceInfo);
 
             var profile = GetProfiles()
-                .FirstOrDefault(i => i.Identification != null && IsMatch(deviceInfo, i.Identification));
+                .FirstOrDefault(i => i.Identification is not null && IsMatch(deviceInfo, i.Identification));
 
             if (profile is null)
             {
@@ -171,7 +171,7 @@ namespace Emby.Dlna
         {
             ArgumentNullException.ThrowIfNull(headers);
 
-            var profile = GetProfiles().FirstOrDefault(i => i.Identification != null && IsMatch(headers, i.Identification));
+            var profile = GetProfiles().FirstOrDefault(i => i.Identification is not null && IsMatch(headers, i.Identification));
             if (profile is null)
             {
                 _logger.LogDebug("No matching device profile found. {@Headers}", headers);
@@ -224,7 +224,7 @@ namespace Emby.Dlna
                 return _fileSystem.GetFilePaths(path)
                     .Where(i => string.Equals(Path.GetExtension(i), ".xml", StringComparison.OrdinalIgnoreCase))
                     .Select(i => ParseProfileFile(i, type))
-                    .Where(i => i != null)
+                    .Where(i => i is not null)
                     .ToList()!; // We just filtered out all the nulls
             }
             catch (IOException)

Emby.Dlna/Eventing/DlnaEventManager.cs

@@ -35,7 +35,7 @@ namespace Emby.Dlna.Eventing
         public EventSubscriptionResponse RenewEventSubscription(string subscriptionId, string notificationType, string requestedTimeoutString, string callbackUrl)
         {
             var subscription = GetSubscription(subscriptionId, false);
-            if (subscription != null)
+            if (subscription is not null)
             {
                 subscription.TimeoutSeconds = ParseTimeout(requestedTimeoutString) ?? 300;
                 int timeoutSeconds = subscription.TimeoutSeconds;

Emby.Dlna/Main/DlnaEntryPoint.cs

@@ -222,7 +222,7 @@ namespace Emby.Dlna.Main
         {
             try
             {
-                if (communicationsServer != null)
+                if (communicationsServer is not null)
                 {
                     ((DeviceDiscovery)_deviceDiscovery).Start(communicationsServer);
                 }
@@ -253,7 +253,7 @@ namespace Emby.Dlna.Main
                 return;
             }
 
-            if (_publisher != null)
+            if (_publisher is not null)
             {
                 return;
             }
@@ -382,7 +382,7 @@ namespace Emby.Dlna.Main
         {
             lock (_syncLock)
             {
-                if (_manager != null)
+                if (_manager is not null)
                 {
                     return;
                 }
@@ -417,7 +417,7 @@ namespace Emby.Dlna.Main
         {
             lock (_syncLock)
             {
-                if (_manager != null)
+                if (_manager is not null)
                 {
                     try
                     {
@@ -436,7 +436,7 @@ namespace Emby.Dlna.Main
 
         public void DisposeDevicePublisher()
         {
-            if (_publisher != null)
+            if (_publisher is not null)
             {
                 _logger.LogInformation("Disposing SsdpDevicePublisher");
                 _publisher.Dispose();
@@ -456,7 +456,7 @@ namespace Emby.Dlna.Main
             DisposePlayToManager();
             DisposeDeviceDiscovery();
 
-            if (_communicationsServer != null)
+            if (_communicationsServer is not null)
             {
                 _logger.LogInformation("Disposing SsdpCommunicationsServer");
                 _communicationsServer.Dispose();

Emby.Dlna/PlayTo/Device.cs

@@ -543,7 +543,7 @@ namespace Emby.Dlna.PlayTo
                             currentObject = await GetMediaInfo(avCommands, cancellationToken).ConfigureAwait(false);
                         }
 
-                        if (currentObject != null)
+                        if (currentObject is not null)
                         {
                             UpdateMediaInfo(currentObject, transportState.Value);
                         }
@@ -585,7 +585,7 @@ namespace Emby.Dlna.PlayTo
                 if (_connectFailureCount >= 3)
                 {
                     var action = OnDeviceUnavailable;
-                    if (action != null)
+                    if (action is not null)
                     {
                         _logger.LogDebug("Disposing device due to loss of connection");
                         action();
@@ -631,7 +631,7 @@ namespace Emby.Dlna.PlayTo
                 return;
             }
 
-            var volume = result.Document.Descendants(UPnpNamespaces.RenderingControl + "GetVolumeResponse").Select(i => i.Element("CurrentVolume")).FirstOrDefault(i => i != null);
+            var volume = result.Document.Descendants(UPnpNamespaces.RenderingControl + "GetVolumeResponse").Select(i => i.Element("CurrentVolume")).FirstOrDefault(i => i is not null);
             var volumeValue = volume?.Value;
 
             if (string.IsNullOrWhiteSpace(volumeValue))
@@ -683,7 +683,7 @@ namespace Emby.Dlna.PlayTo
 
             var valueNode = result.Document.Descendants(UPnpNamespaces.RenderingControl + "GetMuteResponse")
                                             .Select(i => i.Element("CurrentMute"))
-                                            .FirstOrDefault(i => i != null);
+                                            .FirstOrDefault(i => i is not null);
 
             IsMuted = string.Equals(valueNode?.Value, "1", StringComparison.OrdinalIgnoreCase);
         }
@@ -715,11 +715,11 @@ namespace Emby.Dlna.PlayTo
             }
 
             var transportState =
-                result.Document.Descendants(UPnpNamespaces.AvTransport + "GetTransportInfoResponse").Select(i => i.Element("CurrentTransportState")).FirstOrDefault(i => i != null);
+                result.Document.Descendants(UPnpNamespaces.AvTransport + "GetTransportInfoResponse").Select(i => i.Element("CurrentTransportState")).FirstOrDefault(i => i is not null);
 
             var transportStateValue = transportState?.Value;
 
-            if (transportStateValue != null
+            if (transportStateValue is not null
                 && Enum.TryParse(transportStateValue, true, out TransportState state))
             {
                 return state;
@@ -832,10 +832,10 @@ namespace Emby.Dlna.PlayTo
                 return (false, null);
             }
 
-            var trackUriElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("TrackURI")).FirstOrDefault(i => i != null);
+            var trackUriElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("TrackURI")).FirstOrDefault(i => i is not null);
             var trackUri = trackUriElem?.Value;
 
-            var durationElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("TrackDuration")).FirstOrDefault(i => i != null);
+            var durationElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("TrackDuration")).FirstOrDefault(i => i is not null);
             var duration = durationElem?.Value;
 
             if (!string.IsNullOrWhiteSpace(duration)
@@ -848,7 +848,7 @@ namespace Emby.Dlna.PlayTo
                 Duration = null;
             }
 
-            var positionElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("RelTime")).FirstOrDefault(i => i != null);
+            var positionElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("RelTime")).FirstOrDefault(i => i is not null);
             var position = positionElem?.Value;
 
             if (!string.IsNullOrWhiteSpace(position) && !string.Equals(position, "NOT_IMPLEMENTED", StringComparison.OrdinalIgnoreCase))
@@ -959,11 +959,11 @@ namespace Emby.Dlna.PlayTo
 
             var resElement = container.Element(UPnpNamespaces.Res);
 
-            if (resElement != null)
+            if (resElement is not null)
             {
                 var info = resElement.Attribute(UPnpNamespaces.ProtocolInfo);
 
-                if (info != null && !string.IsNullOrWhiteSpace(info.Value))
+                if (info is not null && !string.IsNullOrWhiteSpace(info.Value))
                 {
                     return info.Value.Split(':');
                 }
@@ -974,7 +974,7 @@ namespace Emby.Dlna.PlayTo
 
         private async Task<TransportCommands> GetAVProtocolAsync(CancellationToken cancellationToken)
         {
-            if (AvCommands != null)
+            if (AvCommands is not null)
             {
                 return AvCommands;
             }
@@ -1006,7 +1006,7 @@ namespace Emby.Dlna.PlayTo
 
         private async Task<TransportCommands> GetRenderingProtocolAsync(CancellationToken cancellationToken)
         {
-            if (RendererCommands != null)
+            if (RendererCommands is not null)
             {
                 return RendererCommands;
             }
@@ -1070,13 +1070,13 @@ namespace Emby.Dlna.PlayTo
             var friendlyNames = new List<string>();
 
             var name = document.Descendants(UPnpNamespaces.Ud.GetName("friendlyName")).FirstOrDefault();
-            if (name != null && !string.IsNullOrWhiteSpace(name.Value))
+            if (name is not null && !string.IsNullOrWhiteSpace(name.Value))
             {
                 friendlyNames.Add(name.Value);
             }
 
             var room = document.Descendants(UPnpNamespaces.Ud.GetName("roomName")).FirstOrDefault();
-            if (room != null && !string.IsNullOrWhiteSpace(room.Value))
+            if (room is not null && !string.IsNullOrWhiteSpace(room.Value))
             {
                 friendlyNames.Add(room.Value);
             }
@@ -1088,61 +1088,61 @@ namespace Emby.Dlna.PlayTo
             };
 
             var model = document.Descendants(UPnpNamespaces.Ud.GetName("modelName")).FirstOrDefault();
-            if (model != null)
+            if (model is not null)
             {
                 deviceProperties.ModelName = model.Value;
             }
 
             var modelNumber = document.Descendants(UPnpNamespaces.Ud.GetName("modelNumber")).FirstOrDefault();
-            if (modelNumber != null)
+            if (modelNumber is not null)
             {
                 deviceProperties.ModelNumber = modelNumber.Value;
             }
 
             var uuid = document.Descendants(UPnpNamespaces.Ud.GetName("UDN")).FirstOrDefault();
-            if (uuid != null)
+            if (uuid is not null)
             {
                 deviceProperties.UUID = uuid.Value;
             }
 
             var manufacturer = document.Descendants(UPnpNamespaces.Ud.GetName("manufacturer")).FirstOrDefault();
-            if (manufacturer != null)
+            if (manufacturer is not null)
             {
                 deviceProperties.Manufacturer = manufacturer.Value;
             }
 
             var manufacturerUrl = document.Descendants(UPnpNamespaces.Ud.GetName("manufacturerURL")).FirstOrDefault();
-            if (manufacturerUrl != null)
+            if (manufacturerUrl is not null)
             {
                 deviceProperties.ManufacturerUrl = manufacturerUrl.Value;
             }
 
             var presentationUrl = document.Descendants(UPnpNamespaces.Ud.GetName("presentationURL")).FirstOrDefault();
-            if (presentationUrl != null)
+            if (presentationUrl is not null)
             {
                 deviceProperties.PresentationUrl = presentationUrl.Value;
             }
 
             var modelUrl = document.Descendants(UPnpNamespaces.Ud.GetName("modelURL")).FirstOrDefault();
-            if (modelUrl != null)
+            if (modelUrl is not null)
             {
                 deviceProperties.ModelUrl = modelUrl.Value;
             }
 
             var serialNumber = document.Descendants(UPnpNamespaces.Ud.GetName("serialNumber")).FirstOrDefault();
-            if (serialNumber != null)
+            if (serialNumber is not null)
             {
                 deviceProperties.SerialNumber = serialNumber.Value;
             }
 
             var modelDescription = document.Descendants(UPnpNamespaces.Ud.GetName("modelDescription")).FirstOrDefault();
-            if (modelDescription != null)
+            if (modelDescription is not null)
             {
                 deviceProperties.ModelDescription = modelDescription.Value;
             }
 
             var icon = document.Descendants(UPnpNamespaces.Ud.GetName("icon")).FirstOrDefault();
-            if (icon != null)
+            if (icon is not null)
             {
                 deviceProperties.Icon = CreateIcon(icon);
             }
@@ -1164,7 +1164,7 @@ namespace Emby.Dlna.PlayTo
                 {
                     var service = Create(element);
 
-                    if (service != null)
+                    if (service is not null)
                     {
                         deviceProperties.Services.Add(service);
                     }
@@ -1214,7 +1214,7 @@ namespace Emby.Dlna.PlayTo
 
             if (mediaInfo is null)
             {
-                if (previousMediaInfo != null)
+                if (previousMediaInfo is not null)
                 {
                     OnPlaybackStop(previousMediaInfo);
                 }

Emby.Dlna/PlayTo/PlayToController.cs

@@ -84,7 +84,7 @@ namespace Emby.Dlna.PlayTo
             _mediaEncoder = mediaEncoder;
         }
 
-        public bool IsSessionActive => !_disposed && _device != null;
+        public bool IsSessionActive => !_disposed && _device is not null;
 
         public bool SupportsMediaControl => IsSessionActive;
 
@@ -156,7 +156,7 @@ namespace Emby.Dlna.PlayTo
             try
             {
                 var streamInfo = StreamParams.ParseFromUrl(e.OldMediaInfo.Url, _libraryManager, _mediaSourceManager);
-                if (streamInfo.Item != null)
+                if (streamInfo.Item is not null)
                 {
                     var positionTicks = GetProgressPositionTicks(streamInfo);
 
@@ -268,7 +268,7 @@ namespace Emby.Dlna.PlayTo
             {
                 var info = StreamParams.ParseFromUrl(e.MediaInfo.Url, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null)
+                if (info.Item is not null)
                 {
                     var progress = GetProgressInfo(info);
 
@@ -299,7 +299,7 @@ namespace Emby.Dlna.PlayTo
 
                 var info = StreamParams.ParseFromUrl(mediaUrl, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null)
+                if (info.Item is not null)
                 {
                     var progress = GetProgressInfo(info);
 
@@ -441,11 +441,11 @@ namespace Emby.Dlna.PlayTo
         {
             var media = _device.CurrentMediaInfo;
 
-            if (media != null)
+            if (media is not null)
             {
                 var info = StreamParams.ParseFromUrl(media.Url, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null && !EnableClientSideSeek(info))
+                if (info.Item is not null && !EnableClientSideSeek(info))
                 {
                     var user = _session.UserId.Equals(default)
                         ? null
@@ -760,11 +760,11 @@ namespace Emby.Dlna.PlayTo
         {
             var media = _device.CurrentMediaInfo;
 
-            if (media != null)
+            if (media is not null)
             {
                 var info = StreamParams.ParseFromUrl(media.Url, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null)
+                if (info.Item is not null)
                 {
                     var newPosition = GetProgressPositionTicks(info) ?? 0;
 
@@ -791,11 +791,11 @@ namespace Emby.Dlna.PlayTo
         {
             var media = _device.CurrentMediaInfo;
 
-            if (media != null)
+            if (media is not null)
             {
                 var info = StreamParams.ParseFromUrl(media.Url, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null)
+                if (info.Item is not null)
                 {
                     var newPosition = GetProgressPositionTicks(info) ?? 0;
 
@@ -916,7 +916,7 @@ namespace Emby.Dlna.PlayTo
 
             public async Task<MediaSourceInfo> GetMediaSource(CancellationToken cancellationToken)
             {
-                if (_mediaSource != null)
+                if (_mediaSource is not null)
                 {
                     return _mediaSource;
                 }
@@ -926,7 +926,7 @@ namespace Emby.Dlna.PlayTo
                     return null;
                 }
 
-                if (_mediaSourceManager != null)
+                if (_mediaSourceManager is not null)
                 {
                     _mediaSource = await _mediaSourceManager.GetMediaSource(Item, MediaSourceId, LiveStreamId, false, cancellationToken).ConfigureAwait(false);
                 }

Emby.Dlna/PlayTo/PlaylistItemFactory.cs

@@ -29,7 +29,7 @@ namespace Emby.Dlna.PlayTo
             var directPlay = profile.DirectPlayProfiles
                 .FirstOrDefault(i => i.Type == DlnaProfileType.Photo && IsSupported(i, item));
 
-            if (directPlay != null)
+            if (directPlay is not null)
             {
                 playlistItem.StreamInfo.PlayMethod = PlayMethod.DirectStream;
                 playlistItem.StreamInfo.Container = Path.GetExtension(item.Path);
@@ -40,7 +40,7 @@ namespace Emby.Dlna.PlayTo
             var transcodingProfile = profile.TranscodingProfiles
                 .FirstOrDefault(i => i.Type == DlnaProfileType.Photo);
 
-            if (transcodingProfile != null)
+            if (transcodingProfile is not null)
             {
                 playlistItem.StreamInfo.PlayMethod = PlayMethod.Transcode;
                 playlistItem.StreamInfo.Container = "." + transcodingProfile.Container.TrimStart('.');

Emby.Dlna/PlayTo/TransportCommands.cs

@@ -31,7 +31,7 @@ namespace Emby.Dlna.PlayTo
 
             var stateValues = document.Descendants(UPnpNamespaces.ServiceStateTable).FirstOrDefault();
 
-            if (stateValues != null)
+            if (stateValues is not null)
             {
                 foreach (var container in stateValues.Elements(UPnpNamespaces.Svc + "stateVariable"))
                 {
@@ -77,7 +77,7 @@ namespace Emby.Dlna.PlayTo
             var element = container.Descendants(UPnpNamespaces.Svc + "allowedValueList")
                 .FirstOrDefault();
 
-            if (element != null)
+            if (element is not null)
             {
                 var values = element.Descendants(UPnpNamespaces.Svc + "allowedValue");
 
@@ -167,7 +167,7 @@ namespace Emby.Dlna.PlayTo
         {
             var state = StateVariables.FirstOrDefault(a => string.Equals(a.Name, argument.RelatedStateVariable, StringComparison.OrdinalIgnoreCase));
 
-            if (state != null)
+            if (state is not null)
             {
                 var sendValue = state.AllowedValues.FirstOrDefault(a => string.Equals(a, commandParameter, StringComparison.OrdinalIgnoreCase)) ??
                     (state.AllowedValues.Count > 0 ? state.AllowedValues[0] : value);

Emby.Dlna/Service/BaseControlHandler.cs

@@ -173,7 +173,7 @@ namespace Emby.Dlna.Service
                 }
             }
 
-            if (localName != null && namespaceURI != null)
+            if (localName is not null && namespaceURI is not null)
             {
                 return new ControlRequestInfo(localName, namespaceURI);
             }

Emby.Dlna/Ssdp/DeviceDiscovery.cs

@@ -71,7 +71,7 @@ namespace Emby.Dlna.Ssdp
         {
             lock (_syncLock)
             {
-                if (_listenerCount > 0 && _deviceLocator is null && _commsServer != null)
+                if (_listenerCount > 0 && _deviceLocator is null && _commsServer is not null)
                 {
                     _deviceLocator = new SsdpDeviceLocator(_commsServer);
 
@@ -136,7 +136,7 @@ namespace Emby.Dlna.Ssdp
             if (!_disposed)
             {
                 _disposed = true;
-                if (_deviceLocator != null)
+                if (_deviceLocator is not null)
                 {
                     _deviceLocator.Dispose();
                     _deviceLocator = null;

Emby.Naming/AudioBook/AudioBookListResolver.cs

@@ -69,7 +69,7 @@ namespace Emby.Naming.AudioBook
             extras = new List<AudioBookFileInfo>();
             alternativeVersions = new List<AudioBookFileInfo>();
 
-            var haveChaptersOrPages = stackFiles.Any(x => x.ChapterNumber != null || x.PartNumber != null);
+            var haveChaptersOrPages = stackFiles.Any(x => x.ChapterNumber is not null || x.PartNumber is not null);
             var groupedBy = stackFiles.GroupBy(file => new { file.ChapterNumber, file.PartNumber });
             var nameWithReplacedDots = nameParserResult.Name.Replace(' ', '.');
 

Emby.Naming/ExternalFiles/ExternalPathParser.cs

@@ -94,12 +94,12 @@ namespace Emby.Naming.ExternalFiles
                     // Try to translate to three character code
                     var culture = _localizationManager.FindLanguageInfo(currentSliceWithoutSeparator);
 
-                    if (culture != null && pathInfo.Language is null)
+                    if (culture is not null && pathInfo.Language is null)
                     {
                         pathInfo.Language = culture.ThreeLetterISOLanguageName;
                         extraString = extraString.Replace(currentSlice, string.Empty, StringComparison.OrdinalIgnoreCase);
                     }
-                    else if (culture != null && pathInfo.Language == "hin")
+                    else if (culture is not null && pathInfo.Language == "hin")
                     {
                         // Hindi language code "hi" collides with a hearing impaired flag - use as Hindi only if no other language is set
                         pathInfo.IsHearingImpaired = true;

Emby.Naming/TV/EpisodePathParser.cs

@@ -76,7 +76,7 @@ namespace Emby.Naming.TV
                 }
             }
 
-            if (result != null && fillExtendedInfo)
+            if (result is not null && fillExtendedInfo)
             {
                 FillAdditional(path, result);
 

Emby.Naming/TV/SeriesPathParser.cs

@@ -28,7 +28,7 @@ namespace Emby.Naming.TV
                 }
             }
 
-            if (result != null)
+            if (result is not null)
             {
                 if (!string.IsNullOrEmpty(result.SeriesName))
                 {

Emby.Naming/Video/ExtraRuleResolver.cs

@@ -76,7 +76,7 @@ namespace Emby.Naming.Video
                     }
                 }
 
-                if (result.ExtraType != null)
+                if (result.ExtraType is not null)
                 {
                     return result;
                 }

Emby.Naming/Video/VideoListResolver.cs

@@ -109,7 +109,7 @@ namespace Emby.Naming.Video
             for (var i = 0; i < videos.Count; i++)
             {
                 var video = videos[i];
-                if (video.ExtraType != null)
+                if (video.ExtraType is not null)
                 {
                     continue;
                 }

Emby.Notifications/NotificationManager.cs

@@ -113,7 +113,7 @@ namespace Emby.Notifications
                 }
             }
 
-            if (options != null && !string.IsNullOrEmpty(request.NotificationType))
+            if (options is not null && !string.IsNullOrEmpty(request.NotificationType))
             {
                 var config = GetConfiguration();
 

Emby.Photos/PhotoProvider.cs

@@ -49,7 +49,7 @@ namespace Emby.Photos
             if (item.IsFileProtocol)
             {
                 var file = directoryService.GetFile(item.Path);
-                return file != null && file.LastWriteTimeUtc != item.DateModified;
+                return file is not null && file.LastWriteTimeUtc != item.DateModified;
             }
 
             return false;
@@ -70,20 +70,20 @@ namespace Emby.Photos
                         if (file.GetTag(TagTypes.TiffIFD) is IFDTag tag)
                         {
                             var structure = tag.Structure;
-                            if (structure != null
+                            if (structure is not null
                                 && structure.GetEntry(0, (ushort)IFDEntryTag.ExifIFD) is SubIFDEntry exif)
                             {
                                 var exifStructure = exif.Structure;
-                                if (exifStructure != null)
+                                if (exifStructure is not null)
                                 {
                                     var entry = exifStructure.GetEntry(0, (ushort)ExifEntryTag.ApertureValue) as RationalIFDEntry;
-                                    if (entry != null)
+                                    if (entry is not null)
                                     {
                                         item.Aperture = (double)entry.Value.Numerator / entry.Value.Denominator;
                                     }
 
                                     entry = exifStructure.GetEntry(0, (ushort)ExifEntryTag.ShutterSpeedValue) as RationalIFDEntry;
-                                    if (entry != null)
+                                    if (entry is not null)
                                     {
                                         item.ShutterSpeed = (double)entry.Value.Numerator / entry.Value.Denominator;
                                     }

Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs

@@ -131,7 +131,7 @@ namespace Emby.Server.Implementations.AppBase
             {
                 _configuration = value;
 
-                _configurationLoaded = value != null;
+                _configurationLoaded = value is not null;
             }
         }
 

Emby.Server.Implementations/ApplicationHost.cs

@@ -196,7 +196,7 @@ namespace Emby.Server.Implementations
         /// <summary>
         /// Gets a value indicating whether this instance can self restart.
         /// </summary>
-        public bool CanSelfRestart => _startupOptions.RestartPath != null;
+        public bool CanSelfRestart => _startupOptions.RestartPath is not null;
 
         public bool CoreStartupHasCompleted { get; private set; }
 
@@ -311,7 +311,7 @@ namespace Emby.Server.Implementations
         public X509Certificate2 Certificate { get; private set; }
 
         /// <inheritdoc/>
-        public bool ListenWithHttps => Certificate != null && ConfigurationManager.GetNetworkConfiguration().EnableHttps;
+        public bool ListenWithHttps => Certificate is not null && ConfigurationManager.GetNetworkConfiguration().EnableHttps;
 
         public string FriendlyName =>
             string.IsNullOrEmpty(ConfigurationManager.Configuration.ServerName)
@@ -403,7 +403,7 @@ namespace Emby.Server.Implementations
             // Convert to list so this isn't executed for each iteration
             var parts = GetExportTypes<T>()
                 .Select(CreateInstanceSafe)
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .Cast<T>()
                 .ToList();
 
@@ -424,7 +424,7 @@ namespace Emby.Server.Implementations
             // Convert to list so this isn't executed for each iteration
             var parts = GetExportTypes<T>()
                 .Select(i => defaultFunc(i))
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .Cast<T>()
                 .ToList();
 

Emby.Server.Implementations/Channels/ChannelManager.cs

@@ -227,7 +227,7 @@ namespace Emby.Server.Implementations.Channels
                     .ToList();
             }
 
-            if (user != null)
+            if (user is not null)
             {
                 channels = channels.Where(i =>
                 {
@@ -739,7 +739,7 @@ namespace Emby.Server.Implementations.Channels
             query.GroupByPresentationUniqueKey = false;
 
             // null if came from cache
-            if (itemsResult != null)
+            if (itemsResult is not null)
             {
                 var items = itemsResult.Items;
                 var itemsLen = items.Count;
@@ -761,7 +761,7 @@ namespace Emby.Server.Implementations.Channels
                 foreach (var deadId in deadIds)
                 {
                     var deadItem = _libraryManager.GetItemById(deadId);
-                    if (deadItem != null)
+                    if (deadItem is not null)
                     {
                         _libraryManager.DeleteItem(
                             deadItem,
@@ -813,7 +813,7 @@ namespace Emby.Server.Implementations.Channels
                 {
                     await using FileStream jsonStream = AsyncFile.OpenRead(cachePath);
                     var cachedResult = await JsonSerializer.DeserializeAsync<ChannelItemResult>(jsonStream, _jsonOptions, cancellationToken).ConfigureAwait(false);
-                    if (cachedResult != null)
+                    if (cachedResult is not null)
                     {
                         return null;
                     }
@@ -836,7 +836,7 @@ namespace Emby.Server.Implementations.Channels
                     {
                         await using FileStream jsonStream = AsyncFile.OpenRead(cachePath);
                         var cachedResult = await JsonSerializer.DeserializeAsync<ChannelItemResult>(jsonStream, _jsonOptions, cancellationToken).ConfigureAwait(false);
-                        if (cachedResult != null)
+                        if (cachedResult is not null)
                         {
                             return null;
                         }
@@ -1156,7 +1156,7 @@ namespace Emby.Server.Implementations.Channels
             {
                 _libraryManager.CreateItem(item, parentFolder);
 
-                if (info.People != null && info.People.Count > 0)
+                if (info.People is not null && info.People.Count > 0)
                 {
                     _libraryManager.UpdatePeople(item, info.People);
                 }

Emby.Server.Implementations/Collections/CollectionImageProvider.cs

@@ -59,7 +59,7 @@ namespace Emby.Server.Implementations.Collections
                     var episode = subItem as Episode;
 
                     var series = episode?.Series;
-                    if (series != null && series.HasImage(ImageType.Primary))
+                    if (series is not null && series.HasImage(ImageType.Primary))
                     {
                         return series;
                     }
@@ -71,7 +71,7 @@ namespace Emby.Server.Implementations.Collections
 
                     var parent = subItem.GetOwner() ?? subItem.GetParent();
 
-                    if (parent != null && parent.HasImage(ImageType.Primary))
+                    if (parent is not null && parent.HasImage(ImageType.Primary))
                     {
                         if (parent is MusicAlbum)
                         {
@@ -81,7 +81,7 @@ namespace Emby.Server.Implementations.Collections
 
                     return null;
                 })
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .GroupBy(x => x!.Id) // We removed the null values
                 .Select(x => x.First())
                 .ToList()!; // Again... the list doesn't contain any null values

Emby.Server.Implementations/Collections/CollectionManager.cs

@@ -81,7 +81,7 @@ namespace Emby.Server.Implementations.Collections
         internal async Task<Folder?> EnsureLibraryFolder(string path, bool createIfNeeded)
         {
             var existingFolder = FindFolders(path).FirstOrDefault();
-            if (existingFolder != null)
+            if (existingFolder is not null)
             {
                 return existingFolder;
             }
@@ -265,7 +265,7 @@ namespace Emby.Server.Implementations.Collections
             {
                 var childItem = _libraryManager.GetItemById(guidId);
 
-                var child = collection.LinkedChildren.FirstOrDefault(i => (i.ItemId.HasValue && i.ItemId.Value.Equals(guidId)) || (childItem != null && string.Equals(childItem.Path, i.Path, StringComparison.OrdinalIgnoreCase)));
+                var child = collection.LinkedChildren.FirstOrDefault(i => (i.ItemId.HasValue && i.ItemId.Value.Equals(guidId)) || (childItem is not null && string.Equals(childItem.Path, i.Path, StringComparison.OrdinalIgnoreCase)));
 
                 if (child is null)
                 {
@@ -275,7 +275,7 @@ namespace Emby.Server.Implementations.Collections
 
                 list.Add(child);
 
-                if (childItem != null)
+                if (childItem is not null)
                 {
                     itemList.Add(childItem);
                 }

Emby.Server.Implementations/Data/BaseSqliteRepository.cs

@@ -101,7 +101,7 @@ namespace Emby.Server.Implementations.Data
         protected ManagedConnection GetConnection(bool readOnly = false)
         {
             WriteLock.Wait();
-            if (WriteConnection != null)
+            if (WriteConnection is not null)
             {
                 return new ManagedConnection(WriteConnection, WriteLock);
             }

Emby.Server.Implementations/Data/CleanDatabaseScheduledTask.cs

@@ -44,7 +44,7 @@ namespace Emby.Server.Implementations.Data
 
                 var item = _libraryManager.GetItemById(itemId);
 
-                if (item != null)
+                if (item is not null)
                 {
                     _logger.LogInformation("Cleaning item {0} type: {1} path: {2}", item.Name, item.GetType().Name, item.Path ?? string.Empty);
 

Emby.Server.Implementations/Data/SqliteItemRepository.cs

@@ -1146,7 +1146,7 @@ namespace Emby.Server.Implementations.Data
             {
                 var image = ItemImageInfoFromValueString(part);
 
-                if (image != null)
+                if (image is not null)
                 {
                     result[position++] = image;
                 }
@@ -1825,7 +1825,7 @@ namespace Emby.Server.Implementations.Data
             var hasSeries = item as IHasSeries;
             if (hasSeriesFields)
             {
-                if (hasSeries != null)
+                if (hasSeries is not null)
                 {
                     if (reader.TryGetGuid(index, out var seriesId))
                     {
@@ -1938,7 +1938,7 @@ namespace Emby.Server.Implementations.Data
 
             if (HasField(query, ItemFields.SeriesPresentationUniqueKey))
             {
-                if (hasSeries != null)
+                if (hasSeries is not null)
                 {
                     if (reader.TryGetString(index, out var seriesPresentationUniqueKey))
                     {
@@ -2205,7 +2205,7 @@ namespace Emby.Server.Implementations.Data
 
         private bool HasProgramAttributes(InternalItemsQuery query)
         {
-            if (query.ParentType != null && _programExcludeParentTypes.Contains(query.ParentType.Value))
+            if (query.ParentType is not null && _programExcludeParentTypes.Contains(query.ParentType.Value))
             {
                 return false;
             }
@@ -2220,7 +2220,7 @@ namespace Emby.Server.Implementations.Data
 
         private bool HasServiceName(InternalItemsQuery query)
         {
-            if (query.ParentType != null && _programExcludeParentTypes.Contains(query.ParentType.Value))
+            if (query.ParentType is not null && _programExcludeParentTypes.Contains(query.ParentType.Value))
             {
                 return false;
             }
@@ -2235,7 +2235,7 @@ namespace Emby.Server.Implementations.Data
 
         private bool HasStartDate(InternalItemsQuery query)
         {
-            if (query.ParentType != null && _programExcludeParentTypes.Contains(query.ParentType.Value))
+            if (query.ParentType is not null && _programExcludeParentTypes.Contains(query.ParentType.Value))
             {
                 return false;
             }
@@ -2270,7 +2270,7 @@ namespace Emby.Server.Implementations.Data
 
         private bool HasArtistFields(InternalItemsQuery query)
         {
-            if (query.ParentType != null && _artistExcludeParentTypes.Contains(query.ParentType.Value))
+            if (query.ParentType is not null && _artistExcludeParentTypes.Contains(query.ParentType.Value))
             {
                 return false;
             }
@@ -2392,7 +2392,7 @@ namespace Emby.Server.Implementations.Data
                 columns.Add("UserDatas.rating");
             }
 
-            if (query.SimilarTo != null)
+            if (query.SimilarTo is not null)
             {
                 var item = query.SimilarTo;
 
@@ -2681,7 +2681,7 @@ namespace Emby.Server.Implementations.Data
                     foreach (var row in statement.ExecuteQuery())
                     {
                         var item = GetItem(row, query, hasProgramAttributes, hasEpisodeAttributes, hasServiceName, hasStartDate, hasTrailerTypes, hasArtistFields, hasSeriesFields);
-                        if (item != null)
+                        if (item is not null)
                         {
                             items.Add(item);
                         }
@@ -2923,7 +2923,7 @@ namespace Emby.Server.Implementations.Data
                                 foreach (var row in statement.ExecuteQuery())
                                 {
                                     var item = GetItem(row, query, hasProgramAttributes, hasEpisodeAttributes, hasServiceName, hasStartDate, hasTrailerTypes, hasArtistFields, hasSeriesFields);
-                                    if (item != null)
+                                    if (item is not null)
                                     {
                                         list.Add(item);
                                     }
@@ -2966,7 +2966,7 @@ namespace Emby.Server.Implementations.Data
         private string GetOrderByText(InternalItemsQuery query)
         {
             var orderBy = query.OrderBy;
-            bool hasSimilar = query.SimilarTo != null;
+            bool hasSimilar = query.SimilarTo is not null;
             bool hasSearch = !string.IsNullOrEmpty(query.SearchTerm);
 
             if (hasSimilar || hasSearch)
@@ -3396,7 +3396,7 @@ namespace Emby.Server.Implementations.Data
                 }
             }
 
-            if (query.SimilarTo != null && query.MinSimilarityScore > 0)
+            if (query.SimilarTo is not null && query.MinSimilarityScore > 0)
             {
                 whereClauses.Add("SimilarityScore > " + (query.MinSimilarityScore - 1).ToString(CultureInfo.InvariantCulture));
             }
@@ -3683,7 +3683,7 @@ namespace Emby.Server.Implementations.Data
                         .Append(paramName)
                         .Append("))) OR ");
 
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         query.PersonIds[i].TryWriteBytes(idBytes);
                         statement.TryBind(paramName, idBytes);
@@ -3734,7 +3734,7 @@ namespace Emby.Server.Implementations.Data
             if (!string.IsNullOrWhiteSpace(nameContains))
             {
                 whereClauses.Add("(CleanName like @NameContains or OriginalTitle like @NameContains)");
-                if (statement != null)
+                if (statement is not null)
                 {
                     nameContains = FixUnicodeChars(nameContains);
 
@@ -3865,7 +3865,7 @@ namespace Emby.Server.Implementations.Data
                     var paramName = "@ArtistIds" + index;
 
                     clauses.Add("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type<=1))");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, artistId);
                     }
@@ -3886,7 +3886,7 @@ namespace Emby.Server.Implementations.Data
                     var paramName = "@ArtistIds" + index;
 
                     clauses.Add("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type=1))");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, artistId);
                     }
@@ -3907,7 +3907,7 @@ namespace Emby.Server.Implementations.Data
                     var paramName = "@ArtistIds" + index;
 
                     clauses.Add("((select CleanName from TypedBaseItems where guid=" + paramName + ") in (select CleanValue from ItemValues where ItemId=Guid and Type=0) AND (select CleanName from TypedBaseItems where guid=" + paramName + ") not in (select CleanValue from ItemValues where ItemId=Guid and Type=1))");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, artistId);
                     }
@@ -3928,7 +3928,7 @@ namespace Emby.Server.Implementations.Data
                     var paramName = "@AlbumIds" + index;
 
                     clauses.Add("Album in (select Name from typedbaseitems where guid=" + paramName + ")");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, albumId);
                     }
@@ -3949,7 +3949,7 @@ namespace Emby.Server.Implementations.Data
                     var paramName = "@ExcludeArtistId" + index;
 
                     clauses.Add("(guid not in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type<=1))");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, artistId);
                     }
@@ -3970,7 +3970,7 @@ namespace Emby.Server.Implementations.Data
                     var paramName = "@GenreId" + index;
 
                     clauses.Add("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type=2))");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, genreId);
                     }
@@ -3989,7 +3989,7 @@ namespace Emby.Server.Implementations.Data
                 foreach (var item in query.Genres)
                 {
                     clauses.Add("@Genre" + index + " in (select CleanValue from ItemValues where ItemId=Guid and Type=2)");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind("@Genre" + index, GetCleanValue(item));
                     }
@@ -4008,7 +4008,7 @@ namespace Emby.Server.Implementations.Data
                 foreach (var item in tags)
                 {
                     clauses.Add("@Tag" + index + " in (select CleanValue from ItemValues where ItemId=Guid and Type=4)");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind("@Tag" + index, GetCleanValue(item));
                     }
@@ -4027,7 +4027,7 @@ namespace Emby.Server.Implementations.Data
                 foreach (var item in excludeTags)
                 {
                     clauses.Add("@ExcludeTag" + index + " not in (select CleanValue from ItemValues where ItemId=Guid and Type=4)");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind("@ExcludeTag" + index, GetCleanValue(item));
                     }
@@ -4049,7 +4049,7 @@ namespace Emby.Server.Implementations.Data
 
                     clauses.Add("(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=" + paramName + ") and Type=3))");
 
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, studioId);
                     }
@@ -4068,7 +4068,7 @@ namespace Emby.Server.Implementations.Data
                 foreach (var item in query.OfficialRatings)
                 {
                     clauses.Add("OfficialRating=@OfficialRating" + index);
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind("@OfficialRating" + index, item);
                     }
@@ -4083,7 +4083,7 @@ namespace Emby.Server.Implementations.Data
             if (query.MinParentalRating.HasValue)
             {
                 whereClauses.Add("InheritedParentalRatingValue>=@MinParentalRating");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@MinParentalRating", query.MinParentalRating.Value);
                 }
@@ -4092,7 +4092,7 @@ namespace Emby.Server.Implementations.Data
             if (query.MaxParentalRating.HasValue)
             {
                 whereClauses.Add("InheritedParentalRatingValue<=@MaxParentalRating");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@MaxParentalRating", query.MaxParentalRating.Value);
                 }
@@ -4149,7 +4149,7 @@ namespace Emby.Server.Implementations.Data
             if (!string.IsNullOrWhiteSpace(query.HasNoAudioTrackWithLanguage))
             {
                 whereClauses.Add("((select language from MediaStreams where MediaStreams.ItemId=A.Guid and MediaStreams.StreamType='Audio' and MediaStreams.Language=@HasNoAudioTrackWithLanguage limit 1) is null)");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@HasNoAudioTrackWithLanguage", query.HasNoAudioTrackWithLanguage);
                 }
@@ -4158,7 +4158,7 @@ namespace Emby.Server.Implementations.Data
             if (!string.IsNullOrWhiteSpace(query.HasNoInternalSubtitleTrackWithLanguage))
             {
                 whereClauses.Add("((select language from MediaStreams where MediaStreams.ItemId=A.Guid and MediaStreams.StreamType='Subtitle' and MediaStreams.IsExternal=0 and MediaStreams.Language=@HasNoInternalSubtitleTrackWithLanguage limit 1) is null)");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@HasNoInternalSubtitleTrackWithLanguage", query.HasNoInternalSubtitleTrackWithLanguage);
                 }
@@ -4167,7 +4167,7 @@ namespace Emby.Server.Implementations.Data
             if (!string.IsNullOrWhiteSpace(query.HasNoExternalSubtitleTrackWithLanguage))
             {
                 whereClauses.Add("((select language from MediaStreams where MediaStreams.ItemId=A.Guid and MediaStreams.StreamType='Subtitle' and MediaStreams.IsExternal=1 and MediaStreams.Language=@HasNoExternalSubtitleTrackWithLanguage limit 1) is null)");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@HasNoExternalSubtitleTrackWithLanguage", query.HasNoExternalSubtitleTrackWithLanguage);
                 }
@@ -4176,7 +4176,7 @@ namespace Emby.Server.Implementations.Data
             if (!string.IsNullOrWhiteSpace(query.HasNoSubtitleTrackWithLanguage))
             {
                 whereClauses.Add("((select language from MediaStreams where MediaStreams.ItemId=A.Guid and MediaStreams.StreamType='Subtitle' and MediaStreams.Language=@HasNoSubtitleTrackWithLanguage limit 1) is null)");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@HasNoSubtitleTrackWithLanguage", query.HasNoSubtitleTrackWithLanguage);
                 }
@@ -4229,7 +4229,7 @@ namespace Emby.Server.Implementations.Data
             if (query.Years.Length == 1)
             {
                 whereClauses.Add("ProductionYear=@Years");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@Years", query.Years[0].ToString(CultureInfo.InvariantCulture));
                 }
@@ -4245,7 +4245,7 @@ namespace Emby.Server.Implementations.Data
             if (isVirtualItem.HasValue)
             {
                 whereClauses.Add("IsVirtualItem=@IsVirtualItem");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@IsVirtualItem", isVirtualItem.Value);
                 }
@@ -4279,7 +4279,7 @@ namespace Emby.Server.Implementations.Data
             if (queryMediaTypes.Length == 1)
             {
                 whereClauses.Add("MediaType=@MediaTypes");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@MediaTypes", queryMediaTypes[0]);
                 }
@@ -4299,7 +4299,7 @@ namespace Emby.Server.Implementations.Data
                 foreach (var id in query.ItemIds)
                 {
                     includeIds.Add("Guid = @IncludeId" + index);
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind("@IncludeId" + index, id);
                     }
@@ -4318,7 +4318,7 @@ namespace Emby.Server.Implementations.Data
                 foreach (var id in query.ExcludeItemIds)
                 {
                     excludeIds.Add("Guid <> @ExcludeId" + index);
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind("@ExcludeId" + index, id);
                     }
@@ -4329,7 +4329,7 @@ namespace Emby.Server.Implementations.Data
                 whereClauses.Add(string.Join(" AND ", excludeIds));
             }
 
-            if (query.ExcludeProviderIds != null && query.ExcludeProviderIds.Count > 0)
+            if (query.ExcludeProviderIds is not null && query.ExcludeProviderIds.Count > 0)
             {
                 var excludeIds = new List<string>();
 
@@ -4343,7 +4343,7 @@ namespace Emby.Server.Implementations.Data
 
                     var paramName = "@ExcludeProviderId" + index;
                     excludeIds.Add("(ProviderIds is null or ProviderIds not like " + paramName + ")");
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, "%" + pair.Key + "=" + pair.Value + "%");
                     }
@@ -4359,7 +4359,7 @@ namespace Emby.Server.Implementations.Data
                 }
             }
 
-            if (query.HasAnyProviderId != null && query.HasAnyProviderId.Count > 0)
+            if (query.HasAnyProviderId is not null && query.HasAnyProviderId.Count > 0)
             {
                 var hasProviderIds = new List<string>();
 
@@ -4386,7 +4386,7 @@ namespace Emby.Server.Implementations.Data
                     hasProviderIds.Add("ProviderIds like " + paramName);
 
                     // this replaces the placeholder with a value, here: %key=val%
-                    if (statement != null)
+                    if (statement is not null)
                     {
                         statement.TryBind(paramName, "%" + pair.Key + "=" + pair.Value + "%");
                     }
@@ -4468,7 +4468,7 @@ namespace Emby.Server.Implementations.Data
             {
                 whereClauses.Add("Guid in (select itemId from AncestorIds where AncestorId=@AncestorId)");
 
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@AncestorId", query.AncestorIds[0]);
                 }
@@ -4484,7 +4484,7 @@ namespace Emby.Server.Implementations.Data
             {
                 var inClause = "select guid from TypedBaseItems where PresentationUniqueKey=@AncestorWithPresentationUniqueKey";
                 whereClauses.Add(string.Format(CultureInfo.InvariantCulture, "Guid in (select itemId from AncestorIds where AncestorId in ({0}))", inClause));
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@AncestorWithPresentationUniqueKey", query.AncestorWithPresentationUniqueKey);
                 }
@@ -4494,7 +4494,7 @@ namespace Emby.Server.Implementations.Data
             {
                 whereClauses.Add("SeriesPresentationUniqueKey=@SeriesPresentationUniqueKey");
 
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@SeriesPresentationUniqueKey", query.SeriesPresentationUniqueKey);
                 }
@@ -4503,7 +4503,7 @@ namespace Emby.Server.Implementations.Data
             if (query.BlockUnratedItems.Length == 1)
             {
                 whereClauses.Add("(InheritedParentalRatingValue > 0 or UnratedType <> @UnratedType)");
-                if (statement != null)
+                if (statement is not null)
                 {
                     statement.TryBind("@UnratedType", query.BlockUnratedItems[0].ToString());
                 }
@@ -4916,7 +4916,7 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
         {
             var whereClauses = new List<string>();
 
-            if (query.User != null && query.IsFavorite.HasValue)
+            if (query.User is not null && query.IsFavorite.HasValue)
             {
                 whereClauses.Add(@"p.Name IN (
 SELECT Name FROM TypedBaseItems WHERE UserDataKey IN (
@@ -5293,7 +5293,7 @@ AND Type = @InternalPersonType)");
                 .Append(" group by PresentationUniqueKey");
 
             if (query.OrderBy.Count != 0
-                || query.SimilarTo != null
+                || query.SimilarTo is not null
                 || !string.IsNullOrEmpty(query.SearchTerm))
             {
                 stringBuilder.Append(GetOrderByText(query));
@@ -5361,7 +5361,7 @@ AND Type = @InternalPersonType)");
                                     statement.TryBind("@UserId", query.User.InternalId);
                                 }
 
-                                if (typeSubQuery != null)
+                                if (typeSubQuery is not null)
                                 {
                                     GetWhereClauses(typeSubQuery, null);
                                 }
@@ -5382,7 +5382,7 @@ AND Type = @InternalPersonType)");
                                 foreach (var row in statement.ExecuteQuery())
                                 {
                                     var item = GetItem(row, query, hasProgramAttributes, hasEpisodeAttributes, hasServiceName, hasStartDate, hasTrailerTypes, hasArtistFields, hasSeriesFields);
-                                    if (item != null)
+                                    if (item is not null)
                                     {
                                         var countStartColumn = columns.Count - 1;
 
@@ -5402,7 +5402,7 @@ AND Type = @InternalPersonType)");
                                     statement.TryBind("@UserId", query.User.InternalId);
                                 }
 
-                                if (typeSubQuery != null)
+                                if (typeSubQuery is not null)
                                 {
                                     GetWhereClauses(typeSubQuery, null);
                                 }

Emby.Server.Implementations/Data/TypeMapper.cs

@@ -30,7 +30,7 @@ namespace Emby.Server.Implementations.Data
 
             return _typeMap.GetOrAdd(typeName, k => AppDomain.CurrentDomain.GetAssemblies()
                 .Select(a => a.GetType(k))
-                .FirstOrDefault(t => t != null));
+                .FirstOrDefault(t => t is not null));
         }
     }
 }

Emby.Server.Implementations/Dto/DtoService.cs

@@ -213,7 +213,7 @@ namespace Emby.Server.Implementations.Dto
                 dto.DisplayPreferencesId = item.DisplayPreferencesId.ToString("N", CultureInfo.InvariantCulture);
             }
 
-            if (user != null)
+            if (user is not null)
             {
                 AttachUserSpecificInfo(dto, item, user, options);
             }
@@ -254,7 +254,7 @@ namespace Emby.Server.Implementations.Dto
 
             var liveTvManager = LivetvManager;
             var activeRecording = liveTvManager.GetActiveRecordingInfo(item.Path);
-            if (activeRecording != null)
+            if (activeRecording is not null)
             {
                 dto.Type = BaseItemKind.Recording;
                 dto.CanDownload = false;
@@ -317,7 +317,7 @@ namespace Emby.Server.Implementations.Dto
         {
             var dto = GetBaseItemDtoInternal(item, options, user);
 
-            if (taggedItems != null && options.ContainsField(ItemFields.ItemCounts))
+            if (taggedItems is not null && options.ContainsField(ItemFields.ItemCounts))
             {
                 SetItemByNameInfo(item, dto, taggedItems);
             }
@@ -417,7 +417,7 @@ namespace Emby.Server.Implementations.Dto
 
             if (options.ContainsField(ItemFields.BasicSyncInfo))
             {
-                var userCanSync = user != null && user.HasPermission(PermissionKind.EnableContentDownloading);
+                var userCanSync = user is not null && user.HasPermission(PermissionKind.EnableContentDownloading);
                 if (userCanSync && item.SupportsExternalTransfer)
                 {
                     dto.SupportsSync = true;
@@ -460,7 +460,7 @@ namespace Emby.Server.Implementations.Dto
 
             var album = item.AlbumEntity;
 
-            if (album != null)
+            if (album is not null)
             {
                 dto.Album = album.Name;
                 dto.AlbumId = album.Id;
@@ -491,7 +491,7 @@ namespace Emby.Server.Implementations.Dto
         {
             return images
                 .Select(p => GetImageCacheTag(item, p))
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .ToArray();
         }
 
@@ -570,7 +570,7 @@ namespace Emby.Server.Implementations.Dto
                         _logger.LogError(ex, "Error getting person {Name}", c);
                         return null;
                     }
-                }).Where(i => i != null)
+                }).Where(i => i is not null)
                 .Where(i => user is null ?
                     true :
                     i.IsVisible(user))
@@ -593,13 +593,13 @@ namespace Emby.Server.Implementations.Dto
                 {
                     baseItemPerson.PrimaryImageTag = GetTagAndFillBlurhash(dto, entity, ImageType.Primary);
                     baseItemPerson.Id = entity.Id;
-                    if (dto.ImageBlurHashes != null)
+                    if (dto.ImageBlurHashes is not null)
                     {
                         // Only add BlurHash for the person's image.
                         baseItemPerson.ImageBlurHashes = new Dictionary<ImageType, Dictionary<string, string>>();
                         foreach (var (imageType, blurHash) in dto.ImageBlurHashes)
                         {
-                            if (blurHash != null)
+                            if (blurHash is not null)
                             {
                                 baseItemPerson.ImageBlurHashes[imageType] = new Dictionary<string, string>();
                                 foreach (var (imageId, blurHashValue) in blurHash)
@@ -662,7 +662,7 @@ namespace Emby.Server.Implementations.Dto
         private string GetTagAndFillBlurhash(BaseItemDto dto, BaseItem item, ImageType imageType, int imageIndex = 0)
         {
             var image = item.GetImageInfo(imageType, imageIndex);
-            if (image != null)
+            if (image is not null)
             {
                 return GetTagAndFillBlurhash(dto, item, image);
             }
@@ -782,7 +782,7 @@ namespace Emby.Server.Implementations.Dto
                     {
                         var tag = GetTagAndFillBlurhash(dto, item, image);
 
-                        if (tag != null)
+                        if (tag is not null)
                         {
                             dto.ImageTags[image.Type] = tag;
                         }
@@ -917,7 +917,7 @@ namespace Emby.Server.Implementations.Dto
 
                 var albumParent = audio.AlbumEntity;
 
-                if (albumParent != null)
+                if (albumParent is not null)
                 {
                     dto.AlbumId = albumParent.Id;
                     dto.AlbumPrimaryImageTag = GetTagAndFillBlurhash(dto, albumParent, ImageType.Primary);
@@ -967,7 +967,7 @@ namespace Emby.Server.Implementations.Dto
                         {
                             EnableImages = false
                         });
-                        if (artist != null)
+                        if (artist is not null)
                         {
                             return new NameGuidPair
                             {
@@ -977,7 +977,7 @@ namespace Emby.Server.Implementations.Dto
                         }
 
                         return null;
-                    }).Where(i => i != null).ToArray();
+                    }).Where(i => i is not null).ToArray();
             }
 
             if (item is IHasAlbumArtist hasAlbumArtist)
@@ -1016,7 +1016,7 @@ namespace Emby.Server.Implementations.Dto
                         {
                             EnableImages = false
                         });
-                        if (artist != null)
+                        if (artist is not null)
                         {
                             return new NameGuidPair
                             {
@@ -1026,7 +1026,7 @@ namespace Emby.Server.Implementations.Dto
                         }
 
                         return null;
-                    }).Where(i => i != null).ToArray();
+                    }).Where(i => i is not null).ToArray();
             }
 
             // Add video info
@@ -1073,7 +1073,7 @@ namespace Emby.Server.Implementations.Dto
                 {
                     MediaStream[] mediaStreams;
 
-                    if (dto.MediaSources != null && dto.MediaSources.Length > 0)
+                    if (dto.MediaSources is not null && dto.MediaSources.Length > 0)
                     {
                         if (item.SourceType == SourceType.Channel)
                         {
@@ -1140,7 +1140,7 @@ namespace Emby.Server.Implementations.Dto
                 // if (options.ContainsField(ItemFields.SeriesPrimaryImage))
                 {
                     episodeSeries ??= episode.Series;
-                    if (episodeSeries != null)
+                    if (episodeSeries is not null)
                     {
                         dto.SeriesPrimaryImageTag = GetTagAndFillBlurhash(dto, episodeSeries, ImageType.Primary);
                         if (dto.ImageTags is null || !dto.ImageTags.ContainsKey(ImageType.Primary))
@@ -1153,7 +1153,7 @@ namespace Emby.Server.Implementations.Dto
                 if (options.ContainsField(ItemFields.SeriesStudio))
                 {
                     episodeSeries ??= episode.Series;
-                    if (episodeSeries != null)
+                    if (episodeSeries is not null)
                     {
                         dto.SeriesStudio = episodeSeries.Studios.FirstOrDefault();
                     }
@@ -1179,7 +1179,7 @@ namespace Emby.Server.Implementations.Dto
                 if (options.ContainsField(ItemFields.SeriesStudio))
                 {
                     series ??= season.Series;
-                    if (series != null)
+                    if (series is not null)
                     {
                         dto.SeriesStudio = series.Studios.FirstOrDefault();
                     }
@@ -1190,7 +1190,7 @@ namespace Emby.Server.Implementations.Dto
                 // if (options.ContainsField(ItemFields.SeriesPrimaryImage))
                 {
                     series ??= season.Series;
-                    if (series != null)
+                    if (series is not null)
                     {
                         dto.SeriesPrimaryImageTag = GetTagAndFillBlurhash(dto, series, ImageType.Primary);
                         if (dto.ImageTags is null || !dto.ImageTags.ContainsKey(ImageType.Primary))
@@ -1256,7 +1256,7 @@ namespace Emby.Server.Implementations.Dto
             if (item.SourceType == SourceType.Channel)
             {
                 var channel = _libraryManager.GetItemById(item.ChannelId);
-                if (channel != null)
+                if (channel is not null)
                 {
                     dto.ChannelName = channel.Name;
                 }
@@ -1268,7 +1268,7 @@ namespace Emby.Server.Implementations.Dto
             if (currentItem is MusicAlbum musicAlbum)
             {
                 var artist = musicAlbum.GetMusicArtist(new DtoOptions(false));
-                if (artist != null)
+                if (artist is not null)
                 {
                     return artist;
                 }
@@ -1309,9 +1309,9 @@ namespace Emby.Server.Implementations.Dto
 
             var imageTags = dto.ImageTags;
 
-            while ((!(imageTags != null && imageTags.ContainsKey(ImageType.Logo)) && logoLimit > 0)
+            while ((!(imageTags is not null && imageTags.ContainsKey(ImageType.Logo)) && logoLimit > 0)
-                || (!(imageTags != null && imageTags.ContainsKey(ImageType.Art)) && artLimit > 0)
+                || (!(imageTags is not null && imageTags.ContainsKey(ImageType.Art)) && artLimit > 0)
-                || (!(imageTags != null && imageTags.ContainsKey(ImageType.Thumb)) && thumbLimit > 0)
+                || (!(imageTags is not null && imageTags.ContainsKey(ImageType.Thumb)) && thumbLimit > 0)
                 || parent is Series)
             {
                 parent ??= isFirst ? GetImageDisplayParent(item, item) ?? owner : parent;
@@ -1322,40 +1322,40 @@ namespace Emby.Server.Implementations.Dto
 
                 var allImages = parent.ImageInfos;
 
-                if (logoLimit > 0 && !(imageTags != null && imageTags.ContainsKey(ImageType.Logo)) && dto.ParentLogoItemId is null)
+                if (logoLimit > 0 && !(imageTags is not null && imageTags.ContainsKey(ImageType.Logo)) && dto.ParentLogoItemId is null)
                 {
                     var image = allImages.FirstOrDefault(i => i.Type == ImageType.Logo);
 
-                    if (image != null)
+                    if (image is not null)
                     {
                         dto.ParentLogoItemId = parent.Id;
                         dto.ParentLogoImageTag = GetTagAndFillBlurhash(dto, parent, image);
                     }
                 }
 
-                if (artLimit > 0 && !(imageTags != null && imageTags.ContainsKey(ImageType.Art)) && dto.ParentArtItemId is null)
+                if (artLimit > 0 && !(imageTags is not null && imageTags.ContainsKey(ImageType.Art)) && dto.ParentArtItemId is null)
                 {
                     var image = allImages.FirstOrDefault(i => i.Type == ImageType.Art);
 
-                    if (image != null)
+                    if (image is not null)
                     {
                         dto.ParentArtItemId = parent.Id;
                         dto.ParentArtImageTag = GetTagAndFillBlurhash(dto, parent, image);
                     }
                 }
 
-                if (thumbLimit > 0 && !(imageTags != null && imageTags.ContainsKey(ImageType.Thumb)) && (dto.ParentThumbItemId is null || parent is Series) && parent is not ICollectionFolder && parent is not UserView)
+                if (thumbLimit > 0 && !(imageTags is not null && imageTags.ContainsKey(ImageType.Thumb)) && (dto.ParentThumbItemId is null || parent is Series) && parent is not ICollectionFolder && parent is not UserView)
                 {
                     var image = allImages.FirstOrDefault(i => i.Type == ImageType.Thumb);
 
-                    if (image != null)
+                    if (image is not null)
                     {
                         dto.ParentThumbItemId = parent.Id;
                         dto.ParentThumbImageTag = GetTagAndFillBlurhash(dto, parent, image);
                     }
                 }
 
-                if (backdropLimit > 0 && !((dto.BackdropImageTags != null && dto.BackdropImageTags.Length > 0) || (dto.ParentBackdropImageTags != null && dto.ParentBackdropImageTags.Length > 0)))
+                if (backdropLimit > 0 && !((dto.BackdropImageTags is not null && dto.BackdropImageTags.Length > 0) || (dto.ParentBackdropImageTags is not null && dto.ParentBackdropImageTags.Length > 0)))
                 {
                     var images = allImages.Where(i => i.Type == ImageType.Backdrop).Take(backdropLimit).ToList();
 

Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs

@@ -299,7 +299,7 @@ namespace Emby.Server.Implementations.EntryPoints
 
                 SendChangeNotifications(_itemsAdded.ToList(), itemsUpdated, _itemsRemoved.ToList(), foldersAddedTo, foldersRemovedFrom, CancellationToken.None).GetAwaiter().GetResult();
 
-                if (LibraryUpdateTimer != null)
+                if (LibraryUpdateTimer is not null)
                 {
                     LibraryUpdateTimer.Dispose();
                     LibraryUpdateTimer = null;
@@ -475,7 +475,7 @@ namespace Emby.Server.Implementations.EntryPoints
         {
             if (dispose)
             {
-                if (LibraryUpdateTimer != null)
+                if (LibraryUpdateTimer is not null)
                 {
                     LibraryUpdateTimer.Dispose();
                     LibraryUpdateTimer = null;

Emby.Server.Implementations/EntryPoints/UserDataChangeNotifier.cs

@@ -75,11 +75,11 @@ namespace Emby.Server.Implementations.EntryPoints
                 var baseItem = e.Item;
 
                 // Go up one level for indicators
-                if (baseItem != null)
+                if (baseItem is not null)
                 {
                     var parent = baseItem.GetOwner() ?? baseItem.GetParent();
 
-                    if (parent != null)
+                    if (parent is not null)
                     {
                         keys.Add(parent);
                     }
@@ -97,7 +97,7 @@ namespace Emby.Server.Implementations.EntryPoints
 
                 SendNotifications(changes, CancellationToken.None).GetAwaiter().GetResult();
 
-                if (_updateTimer != null)
+                if (_updateTimer is not null)
                 {
                     _updateTimer.Dispose();
                     _updateTimer = null;
@@ -145,7 +145,7 @@ namespace Emby.Server.Implementations.EntryPoints
 
         public void Dispose()
         {
-            if (_updateTimer != null)
+            if (_updateTimer is not null)
             {
                 _updateTimer.Dispose();
                 _updateTimer = null;

Emby.Server.Implementations/IO/FileRefresher.cs

@@ -138,7 +138,7 @@ namespace Emby.Server.Implementations.IO
             IEnumerable<BaseItem> itemsToRefresh = paths
                 .Distinct(StringComparer.OrdinalIgnoreCase)
                 .Select(GetAffectedBaseItem)
-                .Where(item => item != null)
+                .Where(item => item is not null)
                 .GroupBy(x => x!.Id) // Removed null values in the previous .Where()
                 .Select(x => x.First())!;
 
@@ -185,7 +185,7 @@ namespace Emby.Server.Implementations.IO
                 path = System.IO.Path.GetDirectoryName(path) ?? string.Empty;
             }
 
-            if (item != null)
+            if (item is not null)
             {
                 // If the item has been deleted find the first valid parent that still exists
                 while (!Directory.Exists(item.Path) && !File.Exists(item.Path))
@@ -206,7 +206,7 @@ namespace Emby.Server.Implementations.IO
         {
             lock (_timerLock)
             {
-                if (_timer != null)
+                if (_timer is not null)
                 {
                     _timer.Dispose();
                     _timer = null;

Emby.Server.Implementations/IO/LibraryMonitor.cs

@@ -115,7 +115,7 @@ namespace Emby.Server.Implementations.IO
 
             var options = _libraryManager.GetLibraryOptions(item);
 
-            if (options != null)
+            if (options is not null)
             {
                 return options.EnableRealtimeMonitor;
             }

Emby.Server.Implementations/IO/ManagedFileSystem.cs

@@ -149,7 +149,7 @@ namespace Emby.Server.Implementations.IO
             var extension = Path.GetExtension(shortcutPath);
             var handler = _shortcutHandlers.Find(i => string.Equals(extension, i.Extension, StringComparison.OrdinalIgnoreCase));
 
-            if (handler != null)
+            if (handler is not null)
             {
                 handler.Create(shortcutPath, target);
             }
@@ -621,14 +621,14 @@ namespace Emby.Server.Implementations.IO
 
             // On linux and osx the search pattern is case sensitive
             // If we're OK with case-sensitivity, and we're only filtering for one extension, then use the native method
-            if ((enableCaseSensitiveExtensions || _isEnvironmentCaseInsensitive) && extensions != null && extensions.Count == 1)
+            if ((enableCaseSensitiveExtensions || _isEnvironmentCaseInsensitive) && extensions is not null && extensions.Count == 1)
             {
                 return ToMetadata(new DirectoryInfo(path).EnumerateFiles("*" + extensions[0], enumerationOptions));
             }
 
             var files = new DirectoryInfo(path).EnumerateFiles("*", enumerationOptions);
 
-            if (extensions != null && extensions.Count > 0)
+            if (extensions is not null && extensions.Count > 0)
             {
                 files = files.Where(i =>
                 {
@@ -678,14 +678,14 @@ namespace Emby.Server.Implementations.IO
 
             // On linux and osx the search pattern is case sensitive
             // If we're OK with case-sensitivity, and we're only filtering for one extension, then use the native method
-            if ((enableCaseSensitiveExtensions || _isEnvironmentCaseInsensitive) && extensions != null && extensions.Length == 1)
+            if ((enableCaseSensitiveExtensions || _isEnvironmentCaseInsensitive) && extensions is not null && extensions.Length == 1)
             {
                 return Directory.EnumerateFiles(path, "*" + extensions[0], enumerationOptions);
             }
 
             var files = Directory.EnumerateFiles(path, "*", enumerationOptions);
 
-            if (extensions != null && extensions.Length > 0)
+            if (extensions is not null && extensions.Length > 0)
             {
                 files = files.Where(i =>
                 {

Emby.Server.Implementations/IO/StreamHelper.cs

@@ -23,7 +23,7 @@ namespace Emby.Server.Implementations.IO
 
                     await destination.WriteAsync(buffer.AsMemory(0, read), cancellationToken).ConfigureAwait(false);
 
-                    if (onStarted != null)
+                    if (onStarted is not null)
                     {
                         onStarted();
                         onStarted = null;

Emby.Server.Implementations/Images/BaseDynamicImageProvider.cs

@@ -81,7 +81,7 @@ namespace Emby.Server.Implementations.Images
         {
             var image = item.GetImageInfo(imageType, 0);
 
-            if (image != null)
+            if (image is not null)
             {
                 if (!image.IsLocalFile)
                 {
@@ -143,20 +143,20 @@ namespace Emby.Server.Implementations.Images
                     if (useBackdrop)
                     {
                         var backdrop = i.GetImageInfo(ImageType.Backdrop, 0);
-                        if (backdrop != null && backdrop.IsLocalFile)
+                        if (backdrop is not null && backdrop.IsLocalFile)
                         {
                             return backdrop.Path;
                         }
                     }
 
                     var image = i.GetImageInfo(ImageType.Primary, 0);
-                    if (image != null && image.IsLocalFile)
+                    if (image is not null && image.IsLocalFile)
                     {
                         return image.Path;
                     }
 
                     image = i.GetImageInfo(ImageType.Thumb, 0);
-                    if (image != null && image.IsLocalFile)
+                    if (image is not null && image.IsLocalFile)
                     {
                         return image.Path;
                     }
@@ -268,7 +268,7 @@ namespace Emby.Server.Implementations.Images
         {
             var image = item.GetImageInfo(type, 0);
 
-            if (image != null)
+            if (image is not null)
             {
                 if (!image.IsLocalFile)
                 {

Emby.Server.Implementations/Images/DynamicImageProvider.cs

@@ -52,7 +52,7 @@ namespace Emby.Server.Implementations.Images
                 if (i is Episode episode)
                 {
                     var series = episode.Series;
-                    if (series != null)
+                    if (series is not null)
                     {
                         return series;
                     }
@@ -63,7 +63,7 @@ namespace Emby.Server.Implementations.Images
                 if (i is Season season)
                 {
                     var series = season.Series;
-                    if (series != null)
+                    if (series is not null)
                     {
                         return series;
                     }
@@ -74,7 +74,7 @@ namespace Emby.Server.Implementations.Images
                 if (i is Audio audio)
                 {
                     var album = audio.AlbumEntity;
-                    if (album != null && album.HasImage(ImageType.Primary))
+                    if (album is not null && album.HasImage(ImageType.Primary))
                     {
                         return album;
                     }

Emby.Server.Implementations/Images/PlaylistImageProvider.cs

@@ -34,7 +34,7 @@ namespace Emby.Server.Implementations.Images
                     if (subItem is Episode episode)
                     {
                         var series = episode.Series;
-                        if (series != null && series.HasImage(ImageType.Primary))
+                        if (series is not null && series.HasImage(ImageType.Primary))
                         {
                             return series;
                         }
@@ -47,7 +47,7 @@ namespace Emby.Server.Implementations.Images
 
                     var parent = subItem.GetOwner() ?? subItem.GetParent();
 
-                    if (parent != null && parent.HasImage(ImageType.Primary))
+                    if (parent is not null && parent.HasImage(ImageType.Primary))
                     {
                         if (parent is MusicAlbum)
                         {
@@ -57,7 +57,7 @@ namespace Emby.Server.Implementations.Images
 
                     return null;
                 })
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .GroupBy(x => x.Id)
                 .Select(x => x.First())
                 .ToList();

Emby.Server.Implementations/Library/CoreResolutionIgnoreRule.cs

@@ -52,7 +52,7 @@ namespace Emby.Server.Implementations.Library
 
             if (fileInfo.IsDirectory)
             {
-                if (parent != null)
+                if (parent is not null)
                 {
                     // Ignore extras folders but allow it at the collection level
                     if (_namingOptions.AllExtrasTypesFolderNames.ContainsKey(filename)
@@ -65,7 +65,7 @@ namespace Emby.Server.Implementations.Library
             }
             else
             {
-                if (parent != null)
+                if (parent is not null)
                 {
                     // Don't resolve these into audio files
                     if (Path.GetFileNameWithoutExtension(filename.AsSpan()).Equals(BaseItem.ThemeSongFileName, StringComparison.Ordinal)

Emby.Server.Implementations/Library/LibraryManager.cs

@@ -465,9 +465,9 @@ namespace Emby.Server.Implementations.Library
         private BaseItem ResolveItem(ItemResolveArgs args, IItemResolver[] resolvers)
         {
             var item = (resolvers ?? EntityResolvers).Select(r => Resolve(args, r))
-                .FirstOrDefault(i => i != null);
+                .FirstOrDefault(i => i is not null);
 
-            if (item != null)
+            if (item is not null)
             {
                 ResolverHelper.SetInitialItemValues(item, args, _fileSystem, this);
             }
@@ -536,7 +536,7 @@ namespace Emby.Server.Implementations.Library
 
             var fullPath = fileInfo.FullName;
 
-            if (string.IsNullOrEmpty(collectionType) && parent != null)
+            if (string.IsNullOrEmpty(collectionType) && parent is not null)
             {
                 collectionType = GetContentTypeOverride(fullPath, true);
             }
@@ -572,7 +572,7 @@ namespace Emby.Server.Implementations.Library
                 }
                 catch (Exception ex)
                 {
-                    if (parent != null && parent.IsPhysicalRoot)
+                    if (parent is not null && parent.IsPhysicalRoot)
                     {
                         _logger.LogError(ex, "Error in GetFilteredFileSystemEntries isPhysicalRoot: {0} IsVf: {1}", isPhysicalRoot, isVf);
 
@@ -654,7 +654,7 @@ namespace Emby.Server.Implementations.Library
         {
             var fileList = files.Where(i => !IgnoreFile(i, parent)).ToList();
 
-            if (parent != null)
+            if (parent is not null)
             {
                 var multiItemResolvers = resolvers is null ? MultiItemResolvers : resolvers.OfType<IMultiItemResolver>().ToArray();
 
@@ -697,7 +697,7 @@ namespace Emby.Server.Implementations.Library
                     _logger.LogError(ex, "Error resolving path {Path}", file.FullName);
                 }
 
-                if (result != null)
+                if (result is not null)
                 {
                     yield return result;
                 }
@@ -750,7 +750,7 @@ namespace Emby.Server.Implementations.Library
 
             var dbItem = GetItemById(folder.Id) as BasePluginFolder;
 
-            if (dbItem != null && string.Equals(dbItem.Path, folder.Path, StringComparison.OrdinalIgnoreCase))
+            if (dbItem is not null && string.Equals(dbItem.Path, folder.Path, StringComparison.OrdinalIgnoreCase))
             {
                 folder = dbItem;
             }
@@ -952,7 +952,7 @@ namespace Emby.Server.Implementations.Library
                 .Cast<T>()
                 .FirstOrDefault();
 
-                if (existing != null)
+                if (existing is not null)
                 {
                     return existing;
                 }
@@ -1181,7 +1181,7 @@ namespace Emby.Server.Implementations.Library
                             return null;
                         }
                     })
-                    .Where(i => i != null)
+                    .Where(i => i is not null)
                     .OrderBy(i => i)
                     .ToArray(),
 
@@ -1190,17 +1190,17 @@ namespace Emby.Server.Implementations.Library
 
             var libraryFolder = allCollectionFolders.FirstOrDefault(i => string.Equals(i.Path, dir, StringComparison.OrdinalIgnoreCase));
 
-            if (libraryFolder != null && libraryFolder.HasImage(ImageType.Primary))
+            if (libraryFolder is not null && libraryFolder.HasImage(ImageType.Primary))
             {
                 info.PrimaryImageItemId = libraryFolder.Id.ToString("N", CultureInfo.InvariantCulture);
             }
 
-            if (libraryFolder != null)
+            if (libraryFolder is not null)
             {
                 info.ItemId = libraryFolder.Id.ToString("N", CultureInfo.InvariantCulture);
                 info.LibraryOptions = GetLibraryOptions(libraryFolder);
 
-                if (refreshQueue != null)
+                if (refreshQueue is not null)
                 {
                     info.RefreshProgress = libraryFolder.GetRefreshProgress();
 
@@ -1245,7 +1245,7 @@ namespace Emby.Server.Implementations.Library
 
             item = RetrieveItem(id);
 
-            if (item != null)
+            if (item is not null)
             {
                 RegisterItem(item);
             }
@@ -1258,13 +1258,13 @@ namespace Emby.Server.Implementations.Library
             if (query.Recursive && !query.ParentId.Equals(default))
             {
                 var parent = GetItemById(query.ParentId);
-                if (parent != null)
+                if (parent is not null)
                 {
                     SetTopParentIdsOrAncestors(query, new List<BaseItem> { parent });
                 }
             }
 
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User, allowExternalContent);
             }
@@ -1282,13 +1282,13 @@ namespace Emby.Server.Implementations.Library
             if (query.Recursive && !query.ParentId.Equals(default))
             {
                 var parent = GetItemById(query.ParentId);
-                if (parent != null)
+                if (parent is not null)
                 {
                     SetTopParentIdsOrAncestors(query, new List<BaseItem> { parent });
                 }
             }
 
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1302,7 +1302,7 @@ namespace Emby.Server.Implementations.Library
 
             if (query.AncestorIds.Length == 0 && query.TopParentIds.Length == 0)
             {
-                if (query.User != null)
+                if (query.User is not null)
                 {
                     AddUserToQuery(query, query.User);
                 }
@@ -1313,7 +1313,7 @@ namespace Emby.Server.Implementations.Library
 
         public QueryResult<BaseItem> QueryItems(InternalItemsQuery query)
         {
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1331,7 +1331,7 @@ namespace Emby.Server.Implementations.Library
 
         public List<Guid> GetItemIds(InternalItemsQuery query)
         {
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1341,7 +1341,7 @@ namespace Emby.Server.Implementations.Library
 
         public QueryResult<(BaseItem Item, ItemCounts ItemCounts)> GetStudios(InternalItemsQuery query)
         {
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1352,7 +1352,7 @@ namespace Emby.Server.Implementations.Library
 
         public QueryResult<(BaseItem Item, ItemCounts ItemCounts)> GetGenres(InternalItemsQuery query)
         {
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1363,7 +1363,7 @@ namespace Emby.Server.Implementations.Library
 
         public QueryResult<(BaseItem Item, ItemCounts ItemCounts)> GetMusicGenres(InternalItemsQuery query)
         {
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1374,7 +1374,7 @@ namespace Emby.Server.Implementations.Library
 
         public QueryResult<(BaseItem Item, ItemCounts ItemCounts)> GetAllArtists(InternalItemsQuery query)
         {
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1385,7 +1385,7 @@ namespace Emby.Server.Implementations.Library
 
         public QueryResult<(BaseItem Item, ItemCounts ItemCounts)> GetArtists(InternalItemsQuery query)
         {
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1426,7 +1426,7 @@ namespace Emby.Server.Implementations.Library
 
         public QueryResult<(BaseItem Item, ItemCounts ItemCounts)> GetAlbumArtists(InternalItemsQuery query)
         {
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1440,13 +1440,13 @@ namespace Emby.Server.Implementations.Library
             if (query.Recursive && !query.ParentId.Equals(default))
             {
                 var parent = GetItemById(query.ParentId);
-                if (parent != null)
+                if (parent is not null)
                 {
                     SetTopParentIdsOrAncestors(query, new List<BaseItem> { parent });
                 }
             }
 
-            if (query.User != null)
+            if (query.User is not null)
             {
                 AddUserToQuery(query, query.User);
             }
@@ -1524,7 +1524,7 @@ namespace Emby.Server.Implementations.Library
                 if (!view.DisplayParentId.Equals(default))
                 {
                     var displayParent = GetItemById(view.DisplayParentId);
-                    if (displayParent != null)
+                    if (displayParent is not null)
                     {
                         return GetTopParentIdsForQuery(displayParent, user);
                     }
@@ -1535,7 +1535,7 @@ namespace Emby.Server.Implementations.Library
                 if (!view.ParentId.Equals(default))
                 {
                     var displayParent = GetItemById(view.ParentId);
-                    if (displayParent != null)
+                    if (displayParent is not null)
                     {
                         return GetTopParentIdsForQuery(displayParent, user);
                     }
@@ -1544,7 +1544,7 @@ namespace Emby.Server.Implementations.Library
                 }
 
                 // Handle grouping
-                if (user != null && !string.IsNullOrEmpty(view.ViewType) && UserView.IsEligibleForGrouping(view.ViewType)
+                if (user is not null && !string.IsNullOrEmpty(view.ViewType) && UserView.IsEligibleForGrouping(view.ViewType)
                     && user.GetPreference(PreferenceKind.GroupedFolders).Length > 0)
                 {
                     return GetUserRootFolder()
@@ -1564,7 +1564,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             var topParent = item.GetTopParent();
-            if (topParent != null)
+            if (topParent is not null)
             {
                 return new[] { topParent.Id };
             }
@@ -1589,7 +1589,7 @@ namespace Emby.Server.Implementations.Library
             return items
                 .SelectMany(i => i.ToArray())
                 .Select(ResolveIntro)
-                .Where(i => i != null);
+                .Where(i => i is not null);
         }
 
         /// <summary>
@@ -1648,7 +1648,7 @@ namespace Emby.Server.Implementations.Library
                         // Pull the saved db item that will include metadata
                         var dbItem = GetItemById(video.Id) as Video;
 
-                        if (dbItem != null)
+                        if (dbItem is not null)
                         {
                             video = dbItem;
                         }
@@ -1685,7 +1685,7 @@ namespace Emby.Server.Implementations.Library
 
             IOrderedEnumerable<BaseItem> orderedItems = null;
 
-            foreach (var orderBy in sortBy.Select(o => GetComparer(o, user)).Where(c => c != null))
+            foreach (var orderBy in sortBy.Select(o => GetComparer(o, user)).Where(c => c is not null))
             {
                 if (isFirst)
                 {
@@ -1781,7 +1781,7 @@ namespace Emby.Server.Implementations.Library
                 RegisterItem(item);
             }
 
-            if (ItemAdded != null)
+            if (ItemAdded is not null)
             {
                 foreach (var item in items)
                 {
@@ -1811,7 +1811,7 @@ namespace Emby.Server.Implementations.Library
 
         private bool ImageNeedsRefresh(ItemImageInfo image)
         {
-            if (image.Path != null && image.IsLocalFile)
+            if (image.Path is not null && image.IsLocalFile)
             {
                 if (image.Width == 0 || image.Height == 0 || string.IsNullOrEmpty(image.BlurHash))
                 {
@@ -1829,7 +1829,7 @@ namespace Emby.Server.Implementations.Library
                 }
             }
 
-            return image.Path != null && !image.IsLocalFile;
+            return image.Path is not null && !image.IsLocalFile;
         }
 
         /// <inheritdoc />
@@ -1838,7 +1838,7 @@ namespace Emby.Server.Implementations.Library
             ArgumentNullException.ThrowIfNull(item);
 
             var outdated = forceUpdate
-                ? item.ImageInfos.Where(i => i.Path != null).ToArray()
+                ? item.ImageInfos.Where(i => i.Path is not null).ToArray()
                 : item.ImageInfos.Where(ImageNeedsRefresh).ToArray();
             // Skip image processing if current or live tv source
             if (outdated.Length == 0 || item.SourceType != SourceType.Library)
@@ -1923,7 +1923,7 @@ namespace Emby.Server.Implementations.Library
 
             _itemRepository.SaveItems(items, cancellationToken);
 
-            if (ItemUpdated != null)
+            if (ItemUpdated is not null)
             {
                 foreach (var item in items)
                 {
@@ -1975,7 +1975,7 @@ namespace Emby.Server.Implementations.Library
         /// <param name="parent">The parent item.</param>
         public void ReportItemRemoved(BaseItem item, BaseItem parent)
         {
-            if (ItemRemoved != null)
+            if (ItemRemoved is not null)
             {
                 try
                 {
@@ -2006,7 +2006,7 @@ namespace Emby.Server.Implementations.Library
 
         public List<Folder> GetCollectionFolders(BaseItem item)
         {
-            while (item != null)
+            while (item is not null)
             {
                 var parent = item.GetParent();
 
@@ -2028,7 +2028,7 @@ namespace Emby.Server.Implementations.Library
 
         public List<Folder> GetCollectionFolders(BaseItem item, List<Folder> allUserRootChildren)
         {
-            while (item != null)
+            while (item is not null)
             {
                 var parent = item.GetParent();
 
@@ -2251,7 +2251,7 @@ namespace Emby.Server.Implementations.Library
             if (!refresh && !item.DisplayParentId.Equals(default))
             {
                 var displayParent = GetItemById(item.DisplayParentId);
-                refresh = displayParent != null && displayParent.DateLastSaved > item.DateLastRefreshed;
+                refresh = displayParent is not null && displayParent.DateLastSaved > item.DateLastRefreshed;
             }
 
             if (refresh)
@@ -2315,7 +2315,7 @@ namespace Emby.Server.Implementations.Library
             if (!refresh && !item.DisplayParentId.Equals(default))
             {
                 var displayParent = GetItemById(item.DisplayParentId);
-                refresh = displayParent != null && displayParent.DateLastSaved > item.DateLastRefreshed;
+                refresh = displayParent is not null && displayParent.DateLastSaved > item.DateLastRefreshed;
             }
 
             if (refresh)
@@ -2394,7 +2394,7 @@ namespace Emby.Server.Implementations.Library
             if (!refresh && !item.DisplayParentId.Equals(default))
             {
                 var displayParent = GetItemById(item.DisplayParentId);
-                refresh = displayParent != null && displayParent.DateLastSaved > item.DateLastRefreshed;
+                refresh = displayParent is not null && displayParent.DateLastSaved > item.DateLastRefreshed;
             }
 
             if (refresh)
@@ -2441,7 +2441,7 @@ namespace Emby.Server.Implementations.Library
         public bool FillMissingEpisodeNumbersFromPath(Episode episode, bool forceRefresh)
         {
             var series = episode.Series;
-            bool? isAbsoluteNaming = series != null && string.Equals(series.DisplayOrder, "absolute", StringComparison.OrdinalIgnoreCase);
+            bool? isAbsoluteNaming = series is not null && string.Equals(series.DisplayOrder, "absolute", StringComparison.OrdinalIgnoreCase);
             if (!isAbsoluteNaming.Value)
             {
                 // In other words, no filter applied
@@ -2462,7 +2462,7 @@ namespace Emby.Server.Implementations.Library
                 if (episodeInfo is null && parent.GetType() == typeof(Folder))
                 {
                     episodeInfo = resolver.Resolve(parent.Path, true, null, null, isAbsoluteNaming);
-                    if (episodeInfo != null)
+                    if (episodeInfo is not null)
                     {
                         // add the container
                         episodeInfo.Container = Path.GetExtension(episode.Path)?.TrimStart('.');
@@ -2582,7 +2582,7 @@ namespace Emby.Server.Implementations.Library
             {
                 var season = episode.Season;
 
-                if (season != null)
+                if (season is not null)
                 {
                     episode.ParentIndexNumber = season.IndexNumber;
                 }
@@ -2640,7 +2640,7 @@ namespace Emby.Server.Implementations.Library
                         }
 
                         var extra = GetExtra(file, extraType.Value);
-                        if (extra != null)
+                        if (extra is not null)
                         {
                             yield return extra;
                         }
@@ -2649,7 +2649,7 @@ namespace Emby.Server.Implementations.Library
                 else if (!current.IsDirectory && _extraResolver.TryGetExtraTypeForOwner(current.FullName, ownerVideoInfo, out var extraType))
                 {
                     var extra = GetExtra(current, extraType.Value);
-                    if (extra != null)
+                    if (extra is not null)
                     {
                         yield return extra;
                     }
@@ -2666,7 +2666,7 @@ namespace Emby.Server.Implementations.Library
 
                 // Try to retrieve it from the db. If we don't find it, use the resolved version
                 var itemById = GetItemById(extra.Id);
-                if (itemById != null)
+                if (itemById is not null)
                 {
                     extra = itemById;
                 }
@@ -2681,10 +2681,10 @@ namespace Emby.Server.Implementations.Library
         public string GetPathAfterNetworkSubstitution(string path, BaseItem ownerItem)
         {
             string newPath;
-            if (ownerItem != null)
+            if (ownerItem is not null)
             {
                 var libraryOptions = GetLibraryOptions(ownerItem);
-                if (libraryOptions != null)
+                if (libraryOptions is not null)
                 {
                     foreach (var pathInfo in libraryOptions.PathInfos)
                     {
@@ -2753,7 +2753,7 @@ namespace Emby.Server.Implementations.Library
                     return null;
                 }
             })
-            .Where(i => i != null)
+            .Where(i => i is not null)
             .Where(i => query.User is null ?
                 true :
                 i.IsVisible(query.User))
@@ -2838,10 +2838,10 @@ namespace Emby.Server.Implementations.Library
             }
 
             var mediaPathInfos = options.PathInfos;
-            if (mediaPathInfos != null)
+            if (mediaPathInfos is not null)
             {
                 var invalidpath = mediaPathInfos.FirstOrDefault(i => !Directory.Exists(i.Path));
-                if (invalidpath != null)
+                if (invalidpath is not null)
                 {
                     throw new ArgumentException("The specified path does not exist: " + invalidpath.Path + ".");
                 }
@@ -2853,7 +2853,7 @@ namespace Emby.Server.Implementations.Library
             {
                 Directory.CreateDirectory(virtualFolderPath);
 
-                if (collectionType != null)
+                if (collectionType is not null)
                 {
                     var path = Path.Combine(virtualFolderPath, collectionType.ToString().ToLowerInvariant() + ".collection");
 
@@ -2862,7 +2862,7 @@ namespace Emby.Server.Implementations.Library
 
                 CollectionFolder.SaveLibraryOptions(virtualFolderPath, options);
 
-                if (mediaPathInfos != null)
+                if (mediaPathInfos is not null)
                 {
                     foreach (var path in mediaPathInfos)
                     {

Emby.Server.Implementations/Library/LiveStreamHelper.cs

@@ -81,7 +81,7 @@ namespace Emby.Server.Implementations.Library
                     },
                     cancellationToken).ConfigureAwait(false);
 
-                if (cacheFilePath != null)
+                if (cacheFilePath is not null)
                 {
                     Directory.CreateDirectory(Path.GetDirectoryName(cacheFilePath));
                     await using FileStream createStream = AsyncFile.OpenWrite(cacheFilePath);
@@ -140,7 +140,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             var videoStream = mediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Video);
-            if (videoStream != null)
+            if (videoStream is not null)
             {
                 if (!videoStream.BitRate.HasValue)
                 {

Emby.Server.Implementations/Library/MediaSourceManager.cs

@@ -182,7 +182,7 @@ namespace Emby.Server.Implementations.Library
                     source.SupportsDirectStream = SupportsDirectStream(source.Path, source.Protocol);
                 }
 
-                if (user != null)
+                if (user is not null)
                 {
                     SetDefaultAudioAndSubtitleStreamIndexes(item, source, user);
 
@@ -248,7 +248,7 @@ namespace Emby.Server.Implementations.Library
 
             if (protocol == MediaProtocol.Http)
             {
-                if (path != null)
+                if (path is not null)
                 {
                     if (path.Contains(".m3u", StringComparison.OrdinalIgnoreCase))
                     {
@@ -328,7 +328,7 @@ namespace Emby.Server.Implementations.Library
 
             var sources = hasMediaSources.GetMediaSources(enablePathSubstitution);
 
-            if (user != null)
+            if (user is not null)
             {
                 foreach (var source in sources)
                 {
@@ -357,7 +357,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             var culture = _localizationManager.FindLanguageInfo(language);
-            if (culture != null)
+            if (culture is not null)
             {
                 return culture.ThreeLetterISOLanguageNames;
             }
@@ -432,7 +432,7 @@ namespace Emby.Server.Implementations.Library
             {
                 var audio = source.MediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Audio);
 
-                if (audio != null)
+                if (audio is not null)
                 {
                     source.DefaultAudioStreamIndex = audio.Index;
                 }
@@ -553,7 +553,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             var videoStream = mediaSource.MediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Video);
-            if (videoStream != null)
+            if (videoStream is not null)
             {
                 if (!videoStream.BitRate.HasValue)
                 {
@@ -661,7 +661,7 @@ namespace Emby.Server.Implementations.Library
                 },
                     cancellationToken).ConfigureAwait(false);
 
-                if (cacheFilePath != null)
+                if (cacheFilePath is not null)
                 {
                     Directory.CreateDirectory(Path.GetDirectoryName(cacheFilePath));
                     await using FileStream createStream = File.Create(cacheFilePath);
@@ -723,7 +723,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             var videoStream = mediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Video);
-            if (videoStream != null)
+            if (videoStream is not null)
             {
                 if (!videoStream.BitRate.HasValue)
                 {

Emby.Server.Implementations/Library/MediaStreamSelector.cs

@@ -19,7 +19,7 @@ namespace Emby.Server.Implementations.Library
             {
                 var defaultStream = sortedStreams.FirstOrDefault(i => i.IsDefault);
 
-                if (defaultStream != null)
+                if (defaultStream is not null)
                 {
                     return defaultStream.Index;
                 }

Emby.Server.Implementations/Library/ResolverHelper.cs

@@ -31,7 +31,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             // If the resolver didn't specify this
-            if (parent != null)
+            if (parent is not null)
             {
                 item.SetParent(parent);
             }
@@ -71,7 +71,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             // If the resolver didn't specify this
-            if (args.Parent != null)
+            if (args.Parent is not null)
             {
                 item.SetParent(args.Parent);
             }
@@ -113,7 +113,7 @@ namespace Emby.Server.Implementations.Library
             {
                 var childData = args.IsDirectory ? args.GetFileSystemEntryByPath(item.Path) : null;
 
-                if (childData != null)
+                if (childData is not null)
                 {
                     SetDateCreated(item, childData);
                 }
@@ -140,7 +140,7 @@ namespace Emby.Server.Implementations.Library
             if (config.UseFileCreationTimeForDateAdded)
             {
                 // directoryService.getFile may return null
-                if (info != null)
+                if (info is not null)
                 {
                     var dateCreated = info.CreationTimeUtc;
 

Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs

@@ -45,7 +45,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
         {
             var result = ResolveMultipleInternal(parent, files, collectionType);
 
-            if (result != null)
+            if (result is not null)
             {
                 foreach (var item in result.Items)
                 {
@@ -126,7 +126,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
                     item = new AudioBook();
                 }
 
-                if (item != null)
+                if (item is not null)
                 {
                     item.IsShortcut = string.Equals(extension, ".strm", StringComparison.OrdinalIgnoreCase);
 
@@ -183,7 +183,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
                 Items = items
             };
 
-            var isInMixedFolder = resolverResult.Count > 1 || (parent != null && parent.IsTopParent);
+            var isInMixedFolder = resolverResult.Count > 1 || (parent is not null && parent.IsTopParent);
 
             foreach (var resolvedItem in resolverResult)
             {

Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs

@@ -34,7 +34,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Books
 
             var extension = Path.GetExtension(args.Path);
 
-            if (extension != null && _validExtensions.Contains(extension, StringComparison.OrdinalIgnoreCase))
+            if (extension is not null && _validExtensions.Contains(extension, StringComparison.OrdinalIgnoreCase))
             {
                 // It's a book
                 return new Book

Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs

@@ -64,7 +64,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
         {
             var result = ResolveMultipleInternal(parent, files, collectionType);
 
-            if (result != null)
+            if (result is not null)
             {
                 foreach (var item in result.Items)
                 {
@@ -168,12 +168,12 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             }
 
             // Ignore extras
-            if (item?.ExtraType != null)
+            if (item?.ExtraType is not null)
             {
                 return null;
             }
 
-            if (item != null)
+            if (item is not null)
             {
                 item.IsInMixedFolder = true;
             }
@@ -268,7 +268,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
 
             var videoInfos = files
                 .Select(i => VideoResolver.Resolve(i.FullName, i.IsDirectory, NamingOptions, parseName))
-                .Where(f => f != null)
+                .Where(f => f is not null)
                 .ToList();
 
             var resolverResult = VideoListResolver.Resolve(videoInfos, NamingOptions, supportMultiEditions, parseName);
@@ -284,7 +284,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             {
                 var firstVideo = video.Files[0];
                 var path = firstVideo.Path;
-                if (video.ExtraType != null)
+                if (video.ExtraType is not null)
                 {
                     result.ExtraFiles.Add(files.Find(f => string.Equals(f.FullName, path, StringComparison.OrdinalIgnoreCase)));
                     continue;
@@ -568,7 +568,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
 
         private bool IsInvalid(Folder parent, ReadOnlySpan<char> collectionType)
         {
-            if (parent != null)
+            if (parent is not null)
             {
                 if (parent.IsRoot)
                 {

Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs

@@ -46,27 +46,27 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
 
             // If the parent is a Season or Series and the parent is not an extras folder, then this is an Episode if the VideoResolver returns something
             // Also handle flat tv folders
-            if (season != null ||
+            if (season is not null ||
                 string.Equals(args.GetCollectionType(), CollectionType.TvShows, StringComparison.OrdinalIgnoreCase) ||
                 args.HasParent<Series>())
             {
                 var episode = ResolveVideo<Episode>(args, false);
 
                 // Ignore extras
-                if (episode is null || episode.ExtraType != null)
+                if (episode is null || episode.ExtraType is not null)
                 {
                     return null;
                 }
 
                 var series = parent as Series ?? parent.GetParents().OfType<Series>().FirstOrDefault();
 
-                if (series != null)
+                if (series is not null)
                 {
                     episode.SeriesId = series.Id;
                     episode.SeriesName = series.Name;
                 }
 
-                if (season != null)
+                if (season is not null)
                 {
                     episode.SeasonId = season.Id;
                     episode.SeasonName = season.Name;

Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs

@@ -66,7 +66,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
 
                     var episodeInfo = resolver.Resolve(testPath, true);
 
-                    if (episodeInfo?.EpisodeNumber != null && episodeInfo.SeasonNumber.HasValue)
+                    if (episodeInfo?.EpisodeNumber is not null && episodeInfo.SeasonNumber.HasValue)
                     {
                         _logger.LogDebug(
                             "Found folder underneath series with episode number: {0}. Season {1}. Episode {2}",

Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs

@@ -76,7 +76,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                 {
                     if (args.ContainsFileSystemEntryByName("tvshow.nfo"))
                     {
-                        if (args.Parent != null && args.Parent.IsRoot)
+                        if (args.Parent is not null && args.Parent.IsRoot)
                         {
                             // For now, return null, but if we want to allow this in the future then add some additional checks to guard against a misplaced tvshow.nfo
                             return null;
@@ -89,7 +89,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                         };
                     }
 
-                    if (args.Parent != null && args.Parent.IsRoot)
+                    if (args.Parent is not null && args.Parent.IsRoot)
                     {
                         return null;
                     }
@@ -138,7 +138,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                         var episodeResolver = new Naming.TV.EpisodeResolver(namingOptions);
 
                         var episodeInfo = episodeResolver.Resolve(fullName, false, true, false, fillExtendedInfo: false);
-                        if (episodeInfo != null && episodeInfo.EpisodeNumber.HasValue)
+                        if (episodeInfo is not null && episodeInfo.EpisodeNumber.HasValue)
                         {
                             return true;
                         }

Emby.Server.Implementations/Library/UserDataManager.cs

@@ -126,7 +126,7 @@ namespace Emby.Server.Implementations.Library
         {
             var userData = _repository.GetUserData(internalUserId, keys);
 
-            if (userData != null)
+            if (userData is not null)
             {
                 return userData;
             }

Emby.Server.Implementations/Library/UserViewManager.cs

@@ -72,7 +72,7 @@ namespace Emby.Server.Implementations.Library
                     continue;
                 }
 
-                if (collectionFolder != null && UserView.IsEligibleForGrouping(folder) && user.IsFolderGrouped(folder.Id))
+                if (collectionFolder is not null && UserView.IsEligibleForGrouping(folder) && user.IsFolderGrouped(folder.Id))
                 {
                     groupedFolders.Add(collectionFolder);
                     continue;
@@ -214,9 +214,9 @@ namespace Emby.Server.Implementations.Library
                 }
                 else
                 {
-                    var current = list.FirstOrDefault(i => i.Item1 != null && i.Item1.Id.Equals(container.Id));
+                    var current = list.FirstOrDefault(i => i.Item1 is not null && i.Item1.Id.Equals(container.Id));
 
-                    if (current != null)
+                    if (current is not null)
                     {
                         current.Item2.Add(item);
                     }

Emby.Server.Implementations/LiveTv/EmbyTV/DirectRecorder.cs

@@ -34,7 +34,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
         public Task Record(IDirectStreamProvider? directStreamProvider, MediaSourceInfo mediaSource, string targetFile, TimeSpan duration, Action onStarted, CancellationToken cancellationToken)
         {
-            if (directStreamProvider != null)
+            if (directStreamProvider is not null)
             {
                 return RecordFromDirectStreamProvider(directStreamProvider, targetFile, duration, onStarted, cancellationToken);
             }

Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs

@@ -367,7 +367,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             {
                 var epgChannel = GetEpgChannelFromTunerChannel(info, tunerChannel, epgChannels);
 
-                if (epgChannel != null)
+                if (epgChannel is not null)
                 {
                     if (!string.IsNullOrWhiteSpace(epgChannel.Name))
                     {
@@ -450,7 +450,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
                 var channel = epgChannelData.GetChannelById(mappedTunerChannelId);
 
-                if (channel != null)
+                if (channel is not null)
                 {
                     return channel;
                 }
@@ -473,7 +473,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
                 var channel = epgChannelData.GetChannelById(mappedTunerChannelId);
 
-                if (channel != null)
+                if (channel is not null)
                 {
                     return channel;
                 }
@@ -490,7 +490,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
                 var channel = epgChannelData.GetChannelByNumber(tunerChannelNumber);
 
-                if (channel != null)
+                if (channel is not null)
                 {
                     return channel;
                 }
@@ -502,7 +502,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
                 var channel = epgChannelData.GetChannelByName(normalizedName);
 
-                if (channel != null)
+                if (channel is not null)
                 {
                     return channel;
                 }
@@ -552,7 +552,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             }
 
             var remove = _seriesTimerProvider.GetAll().FirstOrDefault(r => string.Equals(r.Id, timerId, StringComparison.OrdinalIgnoreCase));
-            if (remove != null)
+            if (remove is not null)
             {
                 _seriesTimerProvider.Delete(remove);
             }
@@ -563,7 +563,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
         private void CancelTimerInternal(string timerId, bool isSeriesCancelled, bool isManualCancellation)
         {
             var timer = _timerProvider.GetTimer(timerId);
-            if (timer != null)
+            if (timer is not null)
             {
                 var statusChanging = timer.Status != RecordingStatus.Cancelled;
                 timer.Status = RecordingStatus.Cancelled;
@@ -582,7 +582,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                     _timerProvider.AddOrUpdate(timer, false);
                 }
 
-                if (statusChanging && TimerCancelled != null)
+                if (statusChanging && TimerCancelled is not null)
                 {
                     TimerCancelled(this, new GenericEventArgs<string>(timerId));
                 }
@@ -617,7 +617,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 null :
                 _timerProvider.GetTimerByProgramId(info.ProgramId);
 
-            if (existingTimer != null)
+            if (existingTimer is not null)
             {
                 if (existingTimer.Status == RecordingStatus.Cancelled
                     || existingTimer.Status == RecordingStatus.Completed)
@@ -648,7 +648,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 programInfo = GetProgramInfoFromCache(info.ChannelId, info.StartDate);
             }
 
-            if (programInfo != null)
+            if (programInfo is not null)
             {
                 CopyProgramInfoToTimerInfo(programInfo, info);
             }
@@ -668,7 +668,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             // populate info.seriesID
             var program = GetProgramInfoFromCache(info.ProgramId);
 
-            if (program != null)
+            if (program is not null)
             {
                 info.SeriesId = program.ExternalSeriesId;
             }
@@ -714,7 +714,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
         {
             var instance = _seriesTimerProvider.GetAll().FirstOrDefault(i => string.Equals(i.Id, info.Id, StringComparison.OrdinalIgnoreCase));
 
-            if (instance != null)
+            if (instance is not null)
             {
                 instance.ChannelId = info.ChannelId;
                 instance.Days = info.Days;
@@ -861,7 +861,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 }
             };
 
-            if (program != null)
+            if (program is not null)
             {
                 defaults.SeriesId = program.SeriesId;
                 defaults.ProgramId = program.Id;
@@ -947,7 +947,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
                     return provider is null ? null : new Tuple<IListingsProvider, ListingsProviderInfo>(provider, i);
                 })
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .ToList();
         }
 
@@ -964,7 +964,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 null :
                 currentLiveStreams.FirstOrDefault(i => string.Equals(i.OriginalStreamId, streamId, StringComparison.OrdinalIgnoreCase));
 
-            if (result != null && result.EnableStreamSharing)
+            if (result is not null && result.EnableStreamSharing)
             {
                 result.ConsumerCount++;
 
@@ -1134,7 +1134,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 // trim trailing period from the folder name
                 var folderName = _fileSystem.GetValidFilename(timer.Name).Trim().TrimEnd('.').Trim();
 
-                if (metadata != null && metadata.ProductionYear.HasValue)
+                if (metadata is not null && metadata.ProductionYear.HasValue)
                 {
                     folderName += " (" + metadata.ProductionYear.Value.ToString(CultureInfo.InvariantCulture) + ")";
                 }
@@ -1238,7 +1238,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 programInfo = GetProgramInfoFromCache(timer.ChannelId, timer.StartDate);
             }
 
-            if (programInfo != null)
+            if (programInfo is not null)
             {
                 CopyProgramInfoToTimerInfo(programInfo, timer);
             }
@@ -1412,7 +1412,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
             var item = GetAffectedBaseItem(Path.GetDirectoryName(path));
 
-            if (item != null)
+            if (item is not null)
             {
                 _logger.LogInformation("Refreshing recording parent {Path}", item.Path);
 
@@ -1444,12 +1444,12 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 path = Path.GetDirectoryName(path);
             }
 
-            if (item != null)
+            if (item is not null)
             {
                 if (item.GetType() == typeof(Folder) && string.Equals(item.Path, parentPath, StringComparison.OrdinalIgnoreCase))
                 {
                     var parentItem = item.GetParent();
-                    if (parentItem != null && parentItem is not AggregateFolder)
+                    if (parentItem is not null && parentItem is not AggregateFolder)
                     {
                         item = parentItem;
                     }
@@ -1569,7 +1569,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
         {
             var libraryItem = _libraryManager.FindByPath(timer.RecordingPath, false);
 
-            if (libraryItem != null)
+            if (libraryItem is not null)
             {
                 _libraryManager.DeleteItem(
                     libraryItem,
@@ -1714,7 +1714,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 (program.GetImageInfo(ImageType.Thumb, 0) ?? program.GetImageInfo(ImageType.Primary, 0)) :
                 (program.GetImageInfo(ImageType.Primary, 0) ?? program.GetImageInfo(ImageType.Thumb, 0));
 
-            if (image != null)
+            if (image is not null)
             {
                 try
                 {
@@ -1729,7 +1729,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             if (!program.IsSeries)
             {
                 image = program.GetImageInfo(ImageType.Backdrop, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -1742,7 +1742,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 }
 
                 image = program.GetImageInfo(ImageType.Thumb, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -1755,7 +1755,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 }
 
                 image = program.GetImageInfo(ImageType.Logo, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -2367,13 +2367,13 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                             DtoOptions = new DtoOptions()
                         }).FirstOrDefault() as LiveTvChannel;
 
-                    if (channel != null && !string.IsNullOrWhiteSpace(channel.ExternalId))
+                    if (channel is not null && !string.IsNullOrWhiteSpace(channel.ExternalId))
                     {
                         tempChannelCache[parent.ChannelId] = channel;
                     }
                 }
 
-                if (channel != null || tempChannelCache.TryGetValue(parent.ChannelId, out channel))
+                if (channel is not null || tempChannelCache.TryGetValue(parent.ChannelId, out channel))
                 {
                     channelId = channel.ExternalId;
                 }
@@ -2426,13 +2426,13 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                             DtoOptions = new DtoOptions()
                         }).FirstOrDefault() as LiveTvChannel;
 
-                    if (channel != null && !string.IsNullOrWhiteSpace(channel.ExternalId))
+                    if (channel is not null && !string.IsNullOrWhiteSpace(channel.ExternalId))
                     {
                         tempChannelCache[programInfo.ChannelId] = channel;
                     }
                 }
 
-                if (channel != null || tempChannelCache.TryGetValue(programInfo.ChannelId, out channel))
+                if (channel is not null || tempChannelCache.TryGetValue(programInfo.ChannelId, out channel))
                 {
                     channelId = channel.ExternalId;
                 }
@@ -2626,7 +2626,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             {
                 var configuredDevice = configuredDevices.FirstOrDefault(i => string.Equals(i.DeviceId, device.DeviceId, StringComparison.OrdinalIgnoreCase));
 
-                if (configuredDevice != null && !string.Equals(device.Url, configuredDevice.Url, StringComparison.OrdinalIgnoreCase))
+                if (configuredDevice is not null && !string.Equals(device.Url, configuredDevice.Url, StringComparison.OrdinalIgnoreCase))
                 {
                     _logger.LogInformation("Tuner url has changed from {PreviousUrl} to {NewUrl}", configuredDevice.Url, device.Url);
 

Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs

@@ -208,7 +208,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
             // var audioChannels = 2;
             // var audioStream = mediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Audio);
-            // if (audioStream != null)
+            // if (audioStream is not null)
             // {
             //    audioChannels = audioStream.Channels ?? audioChannels;
             // }

Emby.Server.Implementations/LiveTv/EmbyTV/ItemDataProvider.cs

@@ -36,7 +36,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
         [MemberNotNull(nameof(_items))]
         private void EnsureLoaded()
         {
-            if (_items != null)
+            if (_items is not null)
             {
                 return;
             }

Emby.Server.Implementations/LiveTv/EmbyTV/RecordingHelper.cs

@@ -63,7 +63,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                     }
                 }
             }
-            else if (info.IsMovie && info.ProductionYear != null)
+            else if (info.IsMovie && info.ProductionYear is not null)
             {
                 name += " (" + info.ProductionYear + ")";
             }

Emby.Server.Implementations/LiveTv/EmbyTV/TimerManager.cs

@@ -165,7 +165,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             var timerId = (string?)state ?? throw new ArgumentNullException(nameof(state));
 
             var timer = GetAll().FirstOrDefault(i => string.Equals(i.Id, timerId, StringComparison.OrdinalIgnoreCase));
-            if (timer != null)
+            if (timer is not null)
             {
                 TimerFired?.Invoke(this, new GenericEventArgs<TimerInfo>(timer));
             }

Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs

@@ -153,7 +153,7 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                     continue;
                 }
 
-                if (images != null)
+                if (images is not null)
                 {
                     var imageIndex = images.FindIndex(i => i.ProgramId == schedule.ProgramId[..10]);
                     if (imageIndex > -1)
@@ -266,7 +266,7 @@ namespace Emby.Server.Implementations.LiveTv.Listings
             }
 
             string episodeTitle = null;
-            if (details.EpisodeTitle150 != null)
+            if (details.EpisodeTitle150 is not null)
             {
                 episodeTitle = details.EpisodeTitle150;
             }
@@ -315,13 +315,13 @@ namespace Emby.Server.Implementations.LiveTv.Listings
 
             info.ShowId = showId;
 
-            if (programInfo.VideoProperties != null)
+            if (programInfo.VideoProperties is not null)
             {
                 info.IsHD = programInfo.VideoProperties.Contains("hdtv", StringComparison.OrdinalIgnoreCase);
                 info.Is3D = programInfo.VideoProperties.Contains("3d", StringComparison.OrdinalIgnoreCase);
             }
 
-            if (details.ContentRating != null && details.ContentRating.Count > 0)
+            if (details.ContentRating is not null && details.ContentRating.Count > 0)
             {
                 info.OfficialRating = details.ContentRating[0].Code.Replace("TV", "TV-", StringComparison.Ordinal)
                     .Replace("--", "-", StringComparison.Ordinal);
@@ -333,13 +333,13 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                 }
             }
 
-            if (details.Descriptions != null)
+            if (details.Descriptions is not null)
             {
-                if (details.Descriptions.Description1000 != null && details.Descriptions.Description1000.Count > 0)
+                if (details.Descriptions.Description1000 is not null && details.Descriptions.Description1000.Count > 0)
                 {
                     info.Overview = details.Descriptions.Description1000[0].Description;
                 }
-                else if (details.Descriptions.Description100 != null && details.Descriptions.Description100.Count > 0)
+                else if (details.Descriptions.Description100 is not null && details.Descriptions.Description100.Count > 0)
                 {
                     info.Overview = details.Descriptions.Description100[0].Description;
                 }
@@ -351,12 +351,12 @@ namespace Emby.Server.Implementations.LiveTv.Listings
 
                 info.SeriesProviderIds[MetadataProvider.Zap2It.ToString()] = info.SeriesId;
 
-                if (details.Metadata != null)
+                if (details.Metadata is not null)
                 {
                     foreach (var metadataProgram in details.Metadata)
                     {
                         var gracenote = metadataProgram.Gracenote;
-                        if (gracenote != null)
+                        if (gracenote is not null)
                         {
                             info.SeasonNumber = gracenote.Season;
 
@@ -371,13 +371,13 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                 }
             }
 
-            if (details.OriginalAirDate != null)
+            if (details.OriginalAirDate is not null)
             {
                 info.OriginalAirDate = details.OriginalAirDate;
                 info.ProductionYear = info.OriginalAirDate.Value.Year;
             }
 
-            if (details.Movie != null)
+            if (details.Movie is not null)
             {
                 if (!string.IsNullOrEmpty(details.Movie.Year)
                     && int.TryParse(details.Movie.Year, out int year))
@@ -386,7 +386,7 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                 }
             }
 
-            if (details.Genres != null)
+            if (details.Genres is not null)
             {
                 info.Genres = details.Genres.Where(g => !string.IsNullOrWhiteSpace(g)).ToList();
                 info.IsNews = details.Genres.Contains("news", StringComparison.OrdinalIgnoreCase);
@@ -518,7 +518,7 @@ namespace Emby.Server.Implementations.LiveTv.Listings
 
                 var root = await JsonSerializer.DeserializeAsync<IReadOnlyList<HeadendsDto>>(response, _jsonOptions, cancellationToken).ConfigureAwait(false);
 
-                if (root != null)
+                if (root is not null)
                 {
                     foreach (HeadendsDto headend in root)
                     {
@@ -814,7 +814,7 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                     Name = string.IsNullOrWhiteSpace(station.Name) ? channelNumber : station.Name
                 };
 
-                if (station.Logo != null)
+                if (station.Logo is not null)
                 {
                     channelInfo.ImageUrl = station.Logo.Url;
                 }

Emby.Server.Implementations/LiveTv/Listings/XmlTvListingsProvider.cs

@@ -151,9 +151,9 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                 Overview = program.Description,
                 ProductionYear = program.CopyrightDate?.Year,
                 SeasonNumber = program.Episode?.Series,
-                IsSeries = program.Episode != null,
+                IsSeries = program.Episode is not null,
                 IsRepeat = program.IsPreviouslyShown && !program.IsNew,
-                IsPremiere = program.Premiere != null,
+                IsPremiere = program.Premiere is not null,
                 IsKids = program.Categories.Any(c => info.KidsCategories.Contains(c, StringComparison.OrdinalIgnoreCase)),
                 IsMovie = program.Categories.Any(c => info.MovieCategories.Contains(c, StringComparison.OrdinalIgnoreCase)),
                 IsNews = program.Categories.Any(c => info.NewsCategories.Contains(c, StringComparison.OrdinalIgnoreCase)),

Emby.Server.Implementations/LiveTv/LiveTvDtoService.cs

@@ -80,7 +80,7 @@ namespace Emby.Server.Implementations.LiveTv
                 dto.ProgramId = GetInternalProgramId(info.ProgramId).ToString("N", CultureInfo.InvariantCulture);
             }
 
-            if (program != null)
+            if (program is not null)
             {
                 dto.ProgramInfo = _dtoService.GetBaseItemDto(program, new DtoOptions());
 
@@ -98,7 +98,7 @@ namespace Emby.Server.Implementations.LiveTv
                 }
             }
 
-            if (channel != null)
+            if (channel is not null)
             {
                 dto.ChannelName = channel.Name;
 
@@ -168,10 +168,10 @@ namespace Emby.Server.Implementations.LiveTv
                 DtoOptions = new DtoOptions(false)
             }).FirstOrDefault();
 
-            if (librarySeries != null)
+            if (librarySeries is not null)
             {
                 var image = librarySeries.GetImageInfo(ImageType.Thumb, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -185,7 +185,7 @@ namespace Emby.Server.Implementations.LiveTv
                 }
 
                 image = librarySeries.GetImageInfo(ImageType.Backdrop, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -212,10 +212,10 @@ namespace Emby.Server.Implementations.LiveTv
                 Name = string.IsNullOrEmpty(programSeriesId) ? seriesName : null
             }).FirstOrDefault();
 
-            if (program != null)
+            if (program is not null)
             {
                 var image = program.GetImageInfo(ImageType.Primary, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -231,7 +231,7 @@ namespace Emby.Server.Implementations.LiveTv
                 if (dto.ParentBackdropImageTags is null || dto.ParentBackdropImageTags.Length == 0)
                 {
                     image = program.GetImageInfo(ImageType.Backdrop, 0);
-                    if (image != null)
+                    if (image is not null)
                     {
                         try
                         {
@@ -262,10 +262,10 @@ namespace Emby.Server.Implementations.LiveTv
                 DtoOptions = new DtoOptions(false)
             }).FirstOrDefault();
 
-            if (librarySeries != null)
+            if (librarySeries is not null)
             {
                 var image = librarySeries.GetImageInfo(ImageType.Thumb, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -279,7 +279,7 @@ namespace Emby.Server.Implementations.LiveTv
                 }
 
                 image = librarySeries.GetImageInfo(ImageType.Backdrop, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -318,10 +318,10 @@ namespace Emby.Server.Implementations.LiveTv
                 }).FirstOrDefault();
             }
 
-            if (program != null)
+            if (program is not null)
             {
                 var image = program.GetImageInfo(ImageType.Primary, 0);
-                if (image != null)
+                if (image is not null)
                 {
                     try
                     {
@@ -337,7 +337,7 @@ namespace Emby.Server.Implementations.LiveTv
                 if (dto.ParentBackdropImageTags is null || dto.ParentBackdropImageTags.Length == 0)
                 {
                     image = program.GetImageInfo(ImageType.Backdrop, 0);
-                    if (image != null)
+                    if (image is not null)
                     {
                         try
                         {
@@ -460,7 +460,7 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 var channel = _libraryManager.GetItemById(dto.ChannelId);
 
-                if (channel != null)
+                if (channel is not null)
                 {
                     info.ChannelId = channel.ExternalId;
                 }
@@ -470,7 +470,7 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 var program = _libraryManager.GetItemById(dto.ProgramId);
 
-                if (program != null)
+                if (program is not null)
                 {
                     info.ProgramId = program.ExternalId;
                 }
@@ -480,7 +480,7 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 var timer = await liveTv.GetSeriesTimer(dto.SeriesTimerId, cancellationToken).ConfigureAwait(false);
 
-                if (timer != null)
+                if (timer is not null)
                 {
                     info.SeriesTimerId = timer.ExternalId;
                 }
@@ -526,7 +526,7 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 var channel = _libraryManager.GetItemById(dto.ChannelId);
 
-                if (channel != null)
+                if (channel is not null)
                 {
                     info.ChannelId = channel.ExternalId;
                 }
@@ -536,7 +536,7 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 var program = _libraryManager.GetItemById(dto.ProgramId);
 
-                if (program != null)
+                if (program is not null)
                 {
                     info.ProgramId = program.ExternalId;
                 }

Emby.Server.Implementations/LiveTv/LiveTvManager.cs

@@ -446,7 +446,7 @@ namespace Emby.Server.Implementations.LiveTv
                 isNew = true;
             }
 
-            if (channelInfo.Tags != null)
+            if (channelInfo.Tags is not null)
             {
                 if (!channelInfo.Tags.SequenceEqual(item.Tags, StringComparer.OrdinalIgnoreCase))
                 {
@@ -836,7 +836,7 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 var seriesTimers = await GetSeriesTimersInternal(new SeriesTimerQuery(), cancellationToken).ConfigureAwait(false);
                 var seriesTimer = seriesTimers.Items.FirstOrDefault(i => string.Equals(_tvDtoService.GetInternalSeriesTimerId(i.Id).ToString("N", CultureInfo.InvariantCulture), query.SeriesTimerId, StringComparison.OrdinalIgnoreCase));
-                if (seriesTimer != null)
+                if (seriesTimer is not null)
                 {
                     internalQuery.ExternalSeriesId = seriesTimer.SeriesId;
 
@@ -989,7 +989,7 @@ namespace Emby.Server.Implementations.LiveTv
                 var timer = timerList.FirstOrDefault(i => string.Equals(i.ProgramId, externalProgramId, StringComparison.OrdinalIgnoreCase));
                 var foundSeriesTimer = false;
 
-                if (timer != null)
+                if (timer is not null)
                 {
                     if (timer.Status != RecordingStatus.Cancelled && timer.Status != RecordingStatus.Error)
                     {
@@ -1016,7 +1016,7 @@ namespace Emby.Server.Implementations.LiveTv
 
                 var seriesTimer = seriesTimerList.FirstOrDefault(i => string.Equals(i.SeriesId, externalSeriesId, StringComparison.OrdinalIgnoreCase));
 
-                if (seriesTimer != null)
+                if (seriesTimer is not null)
                 {
                     program.SeriesTimerId = _tvDtoService.GetInternalSeriesTimerId(seriesTimer.Id)
                         .ToString("N", CultureInfo.InvariantCulture);
@@ -1086,7 +1086,7 @@ namespace Emby.Server.Implementations.LiveTv
 
             var coreService = _services.OfType<EmbyTV.EmbyTV>().FirstOrDefault();
 
-            if (coreService != null)
+            if (coreService is not null)
             {
                 await coreService.RefreshSeriesTimers(cancellationToken).ConfigureAwait(false);
                 await coreService.RefreshTimers(cancellationToken).ConfigureAwait(false);
@@ -1280,7 +1280,7 @@ namespace Emby.Server.Implementations.LiveTv
                 {
                     var item = _libraryManager.GetItemById(itemId);
 
-                    if (item != null)
+                    if (item is not null)
                     {
                         _libraryManager.DeleteItem(
                             item,
@@ -1377,7 +1377,7 @@ namespace Emby.Server.Implementations.LiveTv
                 limit = null;
 
                 // var allActivePaths = EmbyTV.EmbyTV.Current.GetAllActiveRecordings().Select(i => i.Path).ToArray();
-                // var items = allActivePaths.Select(i => _libraryManager.FindByPath(i, false)).Where(i => i != null).ToArray();
+                // var items = allActivePaths.Select(i => _libraryManager.FindByPath(i, false)).Where(i => i is not null).ToArray();
 
                 // return new QueryResult<BaseItem>
                 // {
@@ -1517,7 +1517,7 @@ namespace Emby.Server.Implementations.LiveTv
                 dto.CompletionPercentage = pct;
             }
 
-            if (channel != null)
+            if (channel is not null)
             {
                 dto.ChannelName = channel.Name;
 
@@ -1887,7 +1887,7 @@ namespace Emby.Server.Implementations.LiveTv
                 {
                     var currentProgram = programs.FirstOrDefault(i => channel.Id.Equals(i.ChannelId));
 
-                    if (currentProgram != null)
+                    if (currentProgram is not null)
                     {
                         currentProgramsList.Add(currentProgram);
                     }
@@ -1913,7 +1913,7 @@ namespace Emby.Server.Implementations.LiveTv
             ILiveTvService service = null;
             ProgramInfo programInfo = null;
 
-            if (program != null)
+            if (program is not null)
             {
                 service = GetService(program);
 
@@ -2317,7 +2317,7 @@ namespace Emby.Server.Implementations.LiveTv
 
             var providerChannel = EmbyTV.EmbyTV.Current.GetEpgChannelFromTunerChannel(mappings, tunerChannel, providerChannels);
 
-            if (providerChannel != null)
+            if (providerChannel is not null)
             {
                 result.ProviderChannelName = providerChannel.Name;
                 result.ProviderChannelId = providerChannel.Id;
@@ -2390,7 +2390,7 @@ namespace Emby.Server.Implementations.LiveTv
                 .SelectMany(i => i.Locations)
                 .Distinct(StringComparer.OrdinalIgnoreCase)
                 .Select(i => _libraryManager.FindByPath(i, true))
-                .Where(i => i != null && i.IsVisibleStandalone(user))
+                .Where(i => i is not null && i.IsVisibleStandalone(user))
                 .SelectMany(i => _libraryManager.GetCollectionFolders(i))
                 .GroupBy(x => x.Id)
                 .Select(x => x.First())

Emby.Server.Implementations/LiveTv/LiveTvMediaSourceProvider.cs

@@ -42,7 +42,7 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 var activeRecordingInfo = _liveTvManager.GetActiveRecordingInfo(item.Path);
 
-                if (string.IsNullOrEmpty(item.Path) || activeRecordingInfo != null)
+                if (string.IsNullOrEmpty(item.Path) || activeRecordingInfo is not null)
                 {
                     return GetMediaSourcesInternal(item, activeRecordingInfo, cancellationToken);
                 }
@@ -59,7 +59,7 @@ namespace Emby.Server.Implementations.LiveTv
 
             try
             {
-                if (activeRecordingInfo != null)
+                if (activeRecordingInfo is not null)
                 {
                     sources = await EmbyTV.EmbyTV.Current.GetRecordingStreamMediaSources(activeRecordingInfo, cancellationToken)
                         .ConfigureAwait(false);

Emby.Server.Implementations/LiveTv/TunerHosts/BaseTunerHost.cs

@@ -147,7 +147,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
                         var channels = await GetChannels(host, true, cancellationToken).ConfigureAwait(false);
                         var channelInfo = channels.FirstOrDefault(i => string.Equals(i.Id, channelId, StringComparison.OrdinalIgnoreCase));
 
-                        if (channelInfo != null)
+                        if (channelInfo is not null)
                         {
                             return await GetChannelStreamMediaSources(host, channelInfo, cancellationToken).ConfigureAwait(false);
                         }
@@ -187,7 +187,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
                     var channels = await GetChannels(host, true, cancellationToken).ConfigureAwait(false);
                     var channelInfo = channels.FirstOrDefault(i => string.Equals(i.Id, channelId, StringComparison.OrdinalIgnoreCase));
 
-                    if (channelInfo != null)
+                    if (channelInfo is not null)
                     {
                         hostsWithChannel.Add(new Tuple<TunerHostInfo, ChannelInfo>(host, channelInfo));
                     }

Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs

@@ -503,7 +503,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
             {
                 var modelInfo = await GetModelInfo(tuner, false, cancellationToken).ConfigureAwait(false);
 
-                if (modelInfo != null && modelInfo.SupportsTranscoding)
+                if (modelInfo is not null && modelInfo.SupportsTranscoding)
                 {
                     if (tuner.AllowHWTranscoding)
                     {
@@ -560,7 +560,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
 
             var mediaSource = GetMediaSource(tunerHost, hdhrId, channel, profile);
 
-            if (hdhomerunChannel != null && hdhomerunChannel.IsLegacyTuner)
+            if (hdhomerunChannel is not null && hdhomerunChannel.IsLegacyTuner)
             {
                 return new HdHomerunUdpStream(
                     mediaSource,
@@ -674,7 +674,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
 
                             var info = await TryGetTunerHostInfo(deviceAddress, cancellationToken).ConfigureAwait(false);
 
-                            if (info != null)
+                            if (info is not null)
                             {
                                 list.Add(info);
                             }

Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunManager.cs

@@ -37,7 +37,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
         {
             using (var socket = _tcpClient)
             {
-                if (socket != null)
+                if (socket is not null)
                 {
                     _tcpClient = null;
 

Emby.Server.Implementations/LiveTv/TunerHosts/LiveStream.cs

@@ -35,7 +35,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             EnableStreamSharing = true;
             UniqueId = Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
 
-            if (tuner != null)
+            if (tuner is not null)
             {
                 TunerHostId = tuner.Id;
             }

Emby.Server.Implementations/MediaEncoder/EncodingManager.cs

@@ -71,7 +71,7 @@ namespace Emby.Server.Implementations.MediaEncoder
             }
 
             var libraryOptions = _libraryManager.GetLibraryOptions(video);
-            if (libraryOptions != null)
+            if (libraryOptions is not null)
             {
                 if (!libraryOptions.EnableChapterImageExtraction)
                 {

Emby.Server.Implementations/Net/UdpSocket.cs

@@ -74,7 +74,7 @@ namespace Emby.Server.Implementations.Net
         private void OnReceiveSocketAsyncEventArgsCompleted(object sender, SocketAsyncEventArgs e)
         {
             var tcs = _currentReceiveTaskCompletionSource;
-            if (tcs != null)
+            if (tcs is not null)
             {
                 _currentReceiveTaskCompletionSource = null;
 
@@ -98,7 +98,7 @@ namespace Emby.Server.Implementations.Net
         private void OnSendSocketAsyncEventArgsCompleted(object sender, SocketAsyncEventArgs e)
         {
             var tcs = _currentSendTaskCompletionSource;
-            if (tcs != null)
+            if (tcs is not null)
             {
                 _currentSendTaskCompletionSource = null;
 

Emby.Server.Implementations/Playlists/PlaylistManager.cs

@@ -183,7 +183,7 @@ namespace Emby.Server.Implementations.Playlists
 
         private List<BaseItem> GetPlaylistItems(IEnumerable<Guid> itemIds, string playlistMediaType, User user, DtoOptions options)
         {
-            var items = itemIds.Select(i => _libraryManager.GetItemById(i)).Where(i => i != null);
+            var items = itemIds.Select(i => _libraryManager.GetItemById(i)).Where(i => i is not null);
 
             return Playlist.GetPlaylistItems(playlistMediaType, items, user, options);
         }

Emby.Server.Implementations/Plugins/PluginManager.cs

@@ -268,7 +268,7 @@ namespace Emby.Server.Implementations.Plugins
                 // If no version is given, return the current instance.
                 var plugins = _plugins.Where(p => p.Id.Equals(id)).ToList();
 
-                plugin = plugins.FirstOrDefault(p => p.Instance != null) ?? plugins.OrderByDescending(p => p.Version).FirstOrDefault();
+                plugin = plugins.FirstOrDefault(p => p.Instance is not null) ?? plugins.OrderByDescending(p => p.Version).FirstOrDefault();
             }
             else
             {
@@ -500,7 +500,7 @@ namespace Emby.Server.Implementations.Plugins
 #pragma warning restore CA1031 // Do not catch general exception types
             {
                 _logger.LogError(ex, "Error creating {Type}", type.FullName);
-                if (plugin != null)
+                if (plugin is not null)
                 {
                     if (ChangePluginState(plugin, PluginStatus.Malfunctioned))
                     {
@@ -523,7 +523,7 @@ namespace Emby.Server.Implementations.Plugins
 
             var predecessor = _plugins.OrderByDescending(p => p.Version)
                 .FirstOrDefault(p => p.Id.Equals(plugin.Id) && p.IsEnabledAndSupported && p.Version != plugin.Version);
-            if (predecessor != null)
+            if (predecessor is not null)
             {
                 return;
             }
@@ -577,7 +577,7 @@ namespace Emby.Server.Implementations.Plugins
                     _logger.LogError(ex, "Error deserializing {Json}.", Encoding.UTF8.GetString(data!));
                 }
 
-                if (manifest != null)
+                if (manifest is not null)
                 {
                     if (!Version.TryParse(manifest.TargetAbi, out var targetAbi))
                     {

Emby.Server.Implementations/ScheduledTasks/ScheduledTaskWorker.cs

@@ -211,7 +211,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
         {
             get
             {
-                if (CurrentCancellationTokenSource != null)
+                if (CurrentCancellationTokenSource is not null)
                 {
                     return CurrentCancellationTokenSource.IsCancellationRequested
                                ? TaskState.Cancelling
@@ -240,7 +240,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
                 ArgumentNullException.ThrowIfNull(value);
 
                 // Cleanup current triggers
-                if (_triggers != null)
+                if (_triggers is not null)
                 {
                     DisposeTriggers();
                 }
@@ -269,7 +269,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
                 ArgumentNullException.ThrowIfNull(value);
 
                 // This null check is not great, but is needed to handle bad user input, or user mucking with the config file incorrectly
-                var triggerList = value.Where(i => i != null).ToArray();
+                var triggerList = value.Where(i => i is not null).ToArray();
 
                 SaveTriggers(triggerList);
 
@@ -369,7 +369,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
         private async Task ExecuteInternal(TaskOptions options)
         {
             // Cancel the current execution, if any
-            if (CurrentCancellationTokenSource != null)
+            if (CurrentCancellationTokenSource is not null)
             {
                 throw new InvalidOperationException("Cannot execute a Task that is already running");
             }
@@ -391,7 +391,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
 
             try
             {
-                if (options != null && options.MaxRuntimeTicks.HasValue)
+                if (options is not null && options.MaxRuntimeTicks.HasValue)
                 {
                     CurrentCancellationTokenSource.CancelAfter(TimeSpan.FromTicks(options.MaxRuntimeTicks.Value));
                 }
@@ -507,7 +507,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
         private Tuple<TaskTriggerInfo, ITaskTrigger>[] LoadTriggers()
         {
             // This null check is not great, but is needed to handle bad user input, or user mucking with the config file incorrectly
-            var settings = LoadTriggerSettings().Where(i => i != null).ToArray();
+            var settings = LoadTriggerSettings().Where(i => i is not null).ToArray();
 
             return settings.Select(i => new Tuple<TaskTriggerInfo, ITaskTrigger>(i, GetTrigger(i))).ToArray();
         }
@@ -583,7 +583,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
 
             result.Key = ScheduledTask.Key;
 
-            if (ex != null)
+            if (ex is not null)
             {
                 result.ErrorMessage = ex.Message;
                 result.LongErrorMessage = ex.StackTrace;
@@ -617,7 +617,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
                 var startTime = CurrentExecutionStartTime;
 
                 var token = CurrentCancellationTokenSource;
-                if (token != null)
+                if (token is not null)
                 {
                     try
                     {
@@ -631,7 +631,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
                 }
 
                 var task = _currentTask;
-                if (task != null)
+                if (task is not null)
                 {
                     try
                     {
@@ -653,7 +653,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
                     }
                 }
 
-                if (token != null)
+                if (token is not null)
                 {
                     try
                     {

Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs

@@ -151,7 +151,7 @@ namespace Emby.Server.Implementations.ScheduledTasks.Tasks
                         previouslyFailedImages.Add(key);
 
                         var parentPath = Path.GetDirectoryName(failHistoryPath);
-                        if (parentPath != null)
+                        if (parentPath is not null)
                         {
                             Directory.CreateDirectory(parentPath);
                         }

Emby.Server.Implementations/ScheduledTasks/Triggers/IntervalTrigger.cs

@@ -100,7 +100,7 @@ namespace Emby.Server.Implementations.ScheduledTasks.Triggers
         {
             DisposeTimer();
 
-            if (Triggered != null)
+            if (Triggered is not null)
             {
                 _lastStartDate = DateTime.UtcNow;
                 Triggered(this, EventArgs.Empty);

Emby.Server.Implementations/Session/SessionManager.cs

@@ -200,7 +200,7 @@ namespace Emby.Server.Implementations.Session
             {
                 var capabilities = _deviceManager.GetCapabilities(info.DeviceId);
 
-                if (capabilities != null)
+                if (capabilities is not null)
                 {
                     ReportCapabilities(info, capabilities, false);
                 }
@@ -238,7 +238,7 @@ namespace Emby.Server.Implementations.Session
         public void UpdateDeviceName(string sessionId, string reportedDeviceName)
         {
             var session = GetSession(sessionId);
-            if (session != null)
+            if (session is not null)
             {
                 session.DeviceName = reportedDeviceName;
             }
@@ -284,7 +284,7 @@ namespace Emby.Server.Implementations.Session
             var lastActivityDate = session.LastActivityDate;
             session.LastActivityDate = activityDate;
 
-            if (user != null)
+            if (user is not null)
             {
                 var userLastActivityDate = user.LastActivityDate ?? DateTime.MinValue;
 
@@ -351,7 +351,7 @@ namespace Emby.Server.Implementations.Session
             CheckDisposed();
             var session = GetSession(sessionId, false);
 
-            if (session != null)
+            if (session is not null)
             {
                 var key = GetSessionKey(session.Client, session.DeviceId);
 
@@ -377,7 +377,7 @@ namespace Emby.Server.Implementations.Session
                 info.MediaSourceId = info.ItemId.ToString("N", CultureInfo.InvariantCulture);
             }
 
-            if (!info.ItemId.Equals(default) && info.Item is null && libraryItem != null)
+            if (!info.ItemId.Equals(default) && info.Item is null && libraryItem is not null)
             {
                 var current = session.NowPlayingItem;
 
@@ -390,7 +390,7 @@ namespace Emby.Server.Implementations.Session
                     {
                         mediaSource = await GetMediaSource(libraryItem, info.MediaSourceId, info.LiveStreamId).ConfigureAwait(false);
 
-                        if (mediaSource != null)
+                        if (mediaSource is not null)
                         {
                             runtimeTicks = mediaSource.RunTimeTicks;
                         }
@@ -579,7 +579,7 @@ namespace Emby.Server.Implementations.Session
 
             users.AddRange(session.AdditionalUsers
                 .Select(i => _userManager.GetUserById(i.UserId))
-                .Where(i => i != null));
+                .Where(i => i is not null));
 
             return users;
         }
@@ -591,7 +591,7 @@ namespace Emby.Server.Implementations.Session
 
         private void StopIdleCheckTimer()
         {
-            if (_idleTimer != null)
+            if (_idleTimer is not null)
             {
                 _idleTimer.Dispose();
                 _idleTimer = null;
@@ -600,7 +600,7 @@ namespace Emby.Server.Implementations.Session
 
         private async void CheckForIdlePlayback(object state)
         {
-            var playingSessions = Sessions.Where(i => i.NowPlayingItem != null)
+            var playingSessions = Sessions.Where(i => i.NowPlayingItem is not null)
                 .ToList();
 
             if (playingSessions.Count > 0)
@@ -630,7 +630,7 @@ namespace Emby.Server.Implementations.Session
                     }
                 }
 
-                playingSessions = Sessions.Where(i => i.NowPlayingItem != null)
+                playingSessions = Sessions.Where(i => i.NowPlayingItem is not null)
                     .ToList();
             }
 
@@ -643,7 +643,7 @@ namespace Emby.Server.Implementations.Session
         private BaseItem GetNowPlayingItem(SessionInfo session, Guid itemId)
         {
             var item = session.FullNowPlayingItem;
-            if (item != null && item.Id.Equals(itemId))
+            if (item is not null && item.Id.Equals(itemId))
             {
                 return item;
             }
@@ -684,7 +684,7 @@ namespace Emby.Server.Implementations.Session
 
             var users = GetUsers(session);
 
-            if (libraryItem != null)
+            if (libraryItem is not null)
             {
                 foreach (var user in users)
                 {
@@ -777,7 +777,7 @@ namespace Emby.Server.Implementations.Session
             var users = GetUsers(session);
 
             // only update saved user data on actual check-ins, not automated ones
-            if (libraryItem != null && !isAutomated)
+            if (libraryItem is not null && !isAutomated)
             {
                 foreach (var user in users)
                 {
@@ -912,7 +912,7 @@ namespace Emby.Server.Implementations.Session
                 info.MediaSourceId = info.ItemId.ToString("N", CultureInfo.InvariantCulture);
             }
 
-            if (!info.ItemId.Equals(default) && info.Item is null && libraryItem != null)
+            if (!info.ItemId.Equals(default) && info.Item is null && libraryItem is not null)
             {
                 var current = session.NowPlayingItem;
 
@@ -933,7 +933,7 @@ namespace Emby.Server.Implementations.Session
                 }
             }
 
-            if (info.Item != null)
+            if (info.Item is not null)
             {
                 var msString = info.PositionTicks.HasValue ? (info.PositionTicks.Value / 10000).ToString(CultureInfo.InvariantCulture) : "unknown";
 
@@ -945,7 +945,7 @@ namespace Emby.Server.Implementations.Session
                     msString);
             }
 
-            if (info.NowPlayingQueue != null)
+            if (info.NowPlayingQueue is not null)
             {
                 session.NowPlayingQueue = info.NowPlayingQueue;
             }
@@ -957,7 +957,7 @@ namespace Emby.Server.Implementations.Session
             var users = GetUsers(session);
             var playedToCompletion = false;
 
-            if (libraryItem != null)
+            if (libraryItem is not null)
             {
                 foreach (var user in users)
                 {
@@ -1164,7 +1164,7 @@ namespace Emby.Server.Implementations.Session
 
             command.ItemIds = items.Select(i => i.Id).ToArray();
 
-            if (user != null)
+            if (user is not null)
             {
                 if (items.Any(i => i.GetPlayAccess(user) != PlayAccess.Full))
                 {
@@ -1173,13 +1173,13 @@ namespace Emby.Server.Implementations.Session
                 }
             }
 
-            if (user != null
+            if (user is not null
                 && command.ItemIds.Length == 1
                 && user.EnableNextEpisodeAutoPlay
                 && _libraryManager.GetItemById(command.ItemIds[0]) is Episode episode)
             {
                 var series = episode.Series;
-                if (series != null)
+                if (series is not null)
                 {
                     var episodes = series.GetEpisodes(
                             user,
@@ -1429,7 +1429,7 @@ namespace Emby.Server.Implementations.Session
 
             var user = session.AdditionalUsers.FirstOrDefault(i => i.UserId.Equals(userId));
 
-            if (user != null)
+            if (user is not null)
             {
                 var list = session.AdditionalUsers.ToList();
                 list.Remove(user);
@@ -1554,7 +1554,7 @@ namespace Emby.Server.Implementations.Session
                 }
             }
 
-            if (existing != null)
+            if (existing is not null)
             {
                 _logger.LogInformation("Reissuing access token: {Token}", existing.AccessToken);
                 return existing.AccessToken;
@@ -1720,7 +1720,7 @@ namespace Emby.Server.Implementations.Session
 
             var info = _dtoService.GetBaseItemDto(item, dtoOptions);
 
-            if (mediaSource != null)
+            if (mediaSource is not null)
             {
                 info.MediaStreams = mediaSource.MediaStreams.ToArray();
             }
@@ -1761,7 +1761,7 @@ namespace Emby.Server.Implementations.Session
             var session = Sessions.FirstOrDefault(i =>
                 string.Equals(i.DeviceId, deviceId, StringComparison.OrdinalIgnoreCase));
 
-            if (session != null)
+            if (session is not null)
             {
                 session.TranscodingInfo = info;
             }

Emby.Server.Implementations/Session/SessionWebSocketListener.cs

@@ -94,7 +94,7 @@ namespace Emby.Server.Implementations.Session
         public async Task ProcessWebSocketConnectedAsync(IWebSocketConnection connection, HttpContext httpContext)
         {
             var session = await GetSession(httpContext, connection.RemoteEndPoint?.ToString()).ConfigureAwait(false);
-            if (session != null)
+            if (session is not null)
             {
                 EnsureController(session, connection);
                 await KeepAliveWebSocket(connection).ConfigureAwait(false);
@@ -221,7 +221,7 @@ namespace Emby.Server.Implementations.Session
         {
             lock (_keepAliveLock)
             {
-                if (_keepAliveCancellationToken != null)
+                if (_keepAliveCancellationToken is not null)
                 {
                     _keepAliveCancellationToken.Cancel();
                     _keepAliveCancellationToken.Dispose();

Emby.Server.Implementations/Sorting/DatePlayedComparer.cs

@@ -58,7 +58,7 @@ namespace Emby.Server.Implementations.Sorting
         {
             var userdata = UserDataRepository.GetUserData(User, x);
 
-            if (userdata != null && userdata.LastPlayedDate.HasValue)
+            if (userdata is not null && userdata.LastPlayedDate.HasValue)
             {
                 return userdata.LastPlayedDate.Value;
             }

Emby.Server.Implementations/SyncPlay/Group.cs

@@ -251,7 +251,7 @@ namespace Emby.Server.Implementations.SyncPlay
             GroupName = request.GroupName;
             AddSession(session);
 
-            var sessionIsPlayingAnItem = session.FullNowPlayingItem != null;
+            var sessionIsPlayingAnItem = session.FullNowPlayingItem is not null;
 
             RestartCurrentItem();
 

Emby.Server.Implementations/TV/TVSeriesManager.cs

@@ -62,7 +62,7 @@ namespace Emby.Server.Implementations.TV
             {
                 var parent = _libraryManager.GetItemById(query.ParentId.Value);
 
-                if (parent != null)
+                if (parent is not null)
                 {
                     parents = new[] { parent };
                 }
@@ -168,7 +168,7 @@ namespace Emby.Server.Implementations.TV
                     return !anyFound && i.LastWatchedDate == DateTime.MinValue;
                 })
                 .Select(i => i.GetEpisodeFunction())
-                .Where(i => i != null);
+                .Where(i => i is not null);
         }
 
         private static string GetUniqueSeriesKey(Episode episode)
@@ -247,23 +247,23 @@ namespace Emby.Server.Implementations.TV
                         DtoOptions = dtoOptions
                     })
                     .Cast<Episode>()
-                    .Where(episode => episode.AirsBeforeSeasonNumber != null || episode.AirsAfterSeasonNumber != null)
+                    .Where(episode => episode.AirsBeforeSeasonNumber is not null || episode.AirsAfterSeasonNumber is not null)
                     .ToList();
 
-                    if (lastWatchedEpisode != null)
+                    if (lastWatchedEpisode is not null)
                     {
                         // Last watched episode is added, because there could be specials that aired before the last watched episode
                         consideredEpisodes.Add(lastWatchedEpisode);
                     }
 
-                    if (nextEpisode != null)
+                    if (nextEpisode is not null)
                     {
                         consideredEpisodes.Add(nextEpisode);
                     }
 
                     var sortedConsideredEpisodes = _libraryManager.Sort(consideredEpisodes, user, new[] { (ItemSortBy.AiredEpisodeOrder, SortOrder.Ascending) })
                         .Cast<Episode>();
-                    if (lastWatchedEpisode != null)
+                    if (lastWatchedEpisode is not null)
                     {
                         sortedConsideredEpisodes = sortedConsideredEpisodes.SkipWhile(episode => !episode.Id.Equals(lastWatchedEpisode.Id)).Skip(1);
                     }
@@ -271,7 +271,7 @@ namespace Emby.Server.Implementations.TV
                     nextEpisode = sortedConsideredEpisodes.FirstOrDefault();
                 }
 
-                if (nextEpisode != null)
+                if (nextEpisode is not null)
                 {
                     var userData = _userDataManager.GetUserData(user, nextEpisode);
 
@@ -284,7 +284,7 @@ namespace Emby.Server.Implementations.TV
                 return nextEpisode;
             }
 
-            if (lastWatchedEpisode != null)
+            if (lastWatchedEpisode is not null)
             {
                 var userData = _userDataManager.GetUserData(user, lastWatchedEpisode);
 

Emby.Server.Implementations/Updates/InstallationManager.cs

@@ -168,7 +168,7 @@ namespace Emby.Server.Implementations.Updates
             var result = new List<PackageInfo>();
             foreach (RepositoryInfo repository in _config.Configuration.PluginRepositories)
             {
-                if (repository.Enabled && repository.Url != null)
+                if (repository.Enabled && repository.Url is not null)
                 {
                     // Where repositories have the same content, the details from the first is taken.
                     foreach (var package in await GetPackages(repository.Name ?? "Unnamed Repo", repository.Url, true, cancellationToken).ConfigureAwait(true))
@@ -181,7 +181,7 @@ namespace Emby.Server.Implementations.Updates
                             var version = package.Versions[i];
 
                             var plugin = _pluginManager.GetPlugin(package.Id, version.VersionNumber);
-                            if (plugin != null)
+                            if (plugin is not null)
                             {
                                 await _pluginManager.GenerateManifest(package, version.VersionNumber, plugin.Path, plugin.Manifest.Status).ConfigureAwait(false);
                             }
@@ -199,7 +199,7 @@ namespace Emby.Server.Implementations.Updates
                             continue;
                         }
 
-                        if (existing != null)
+                        if (existing is not null)
                         {
                             // Assumption is both lists are ordered, so slot these into the correct place.
                             MergeSortedList(existing.Versions, package.Versions);
@@ -222,7 +222,7 @@ namespace Emby.Server.Implementations.Updates
             Guid id = default,
             Version? specificVersion = null)
         {
-            if (name != null)
+            if (name is not null)
             {
                 availablePackages = availablePackages.Where(x => x.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
             }
@@ -232,7 +232,7 @@ namespace Emby.Server.Implementations.Updates
                 availablePackages = availablePackages.Where(x => x.Id.Equals(id));
             }
 
-            if (specificVersion != null)
+            if (specificVersion is not null)
             {
                 availablePackages = availablePackages.Where(x => x.Versions.Any(y => y.VersionNumber.Equals(specificVersion)));
             }
@@ -260,11 +260,11 @@ namespace Emby.Server.Implementations.Updates
             var availableVersions = package.Versions
                 .Where(x => string.IsNullOrEmpty(x.TargetAbi) || Version.Parse(x.TargetAbi) <= appVer);
 
-            if (specificVersion != null)
+            if (specificVersion is not null)
             {
                 availableVersions = availableVersions.Where(x => x.VersionNumber.Equals(specificVersion));
             }
-            else if (minVersion != null)
+            else if (minVersion is not null)
             {
                 availableVersions = availableVersions.Where(x => x.VersionNumber >= minVersion);
             }
@@ -495,7 +495,7 @@ namespace Emby.Server.Implementations.Updates
                 var compatibleVersions = GetCompatibleVersions(pluginCatalog, plugin.Name, plugin.Id, minVersion: plugin.Version);
                 var version = compatibleVersions.FirstOrDefault(y => y.Version > plugin.Version);
 
-                if (version != null && CompletedInstallations.All(x => !x.Id.Equals(version.Id)))
+                if (version is not null && CompletedInstallations.All(x => !x.Id.Equals(version.Id)))
                 {
                     yield return version;
                 }
@@ -567,7 +567,7 @@ namespace Emby.Server.Implementations.Updates
             await PerformPackageInstallation(package, plugin?.Manifest.Status ?? PluginStatus.Active, cancellationToken).ConfigureAwait(false);
             _logger.LogInformation("Plugin {Action}: {PluginName} {PluginVersion}", plugin is null ? "installed" : "updated", package.Name, package.Version);
 
-            return plugin != null;
+            return plugin is not null;
         }
     }
 }

Jellyfin.Api/Auth/BaseAuthorizationHandler.cs

@@ -78,7 +78,7 @@ namespace Jellyfin.Api.Auth
                 return false;
             }
 
-            var isInLocalNetwork = _httpContextAccessor.HttpContext != null
+            var isInLocalNetwork = _httpContextAccessor.HttpContext is not null
                 && _networkManager.IsInLocalNetwork(_httpContextAccessor.HttpContext.GetNormalizedRemoteIp());
 
             // User cannot access remotely and user is remote

Jellyfin.Api/Controllers/ArtistsController.cs

@@ -183,7 +183,7 @@ namespace Jellyfin.Api.Controllers
                     {
                         return null;
                     }
-                }).Where(i => i != null).Select(i => i!.Id).ToArray();
+                }).Where(i => i is not null).Select(i => i!.Id).ToArray();
             }
 
             foreach (var filter in filters)
@@ -386,7 +386,7 @@ namespace Jellyfin.Api.Controllers
                     {
                         return null;
                     }
-                }).Where(i => i != null).Select(i => i!.Id).ToArray();
+                }).Where(i => i is not null).Select(i => i!.Id).ToArray();
             }
 
             foreach (var filter in filters)

Jellyfin.Api/Controllers/DynamicHlsController.cs

@@ -341,7 +341,7 @@ namespace Jellyfin.Api.Controllers
 
             job ??= _transcodingJobHelper.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
 
-            if (job != null)
+            if (job is not null)
             {
                 _transcodingJobHelper.OnTranscodeEndRequest(job);
             }
@@ -1533,7 +1533,7 @@ namespace Jellyfin.Api.Controllers
                     else
                     {
                         job = _transcodingJobHelper.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
-                        if (job?.TranscodingThrottler != null)
+                        if (job?.TranscodingThrottler is not null)
                         {
                             await job.TranscodingThrottler.UnpauseTranscoding().ConfigureAwait(false);
                         }
@@ -1806,7 +1806,7 @@ namespace Jellyfin.Api.Controllers
             if (EncodingHelper.IsCopyCodec(codec))
             {
                 // If h264_mp4toannexb is ever added, do not use it for live tv.
-                if (state.VideoStream != null && !string.Equals(state.VideoStream.NalLengthSize, "0", StringComparison.OrdinalIgnoreCase))
+                if (state.VideoStream is not null && !string.Equals(state.VideoStream.NalLengthSize, "0", StringComparison.OrdinalIgnoreCase))
                 {
                     string bitStreamArgs = EncodingHelper.GetBitStreamArgs(state.VideoStream);
                     if (!string.IsNullOrEmpty(bitStreamArgs))
@@ -1837,7 +1837,7 @@ namespace Jellyfin.Api.Controllers
 
                 // -start_at_zero is necessary to use with -ss when seeking,
                 // otherwise the target position cannot be determined.
-                if (state.SubtitleStream != null)
+                if (state.SubtitleStream is not null)
                 {
                     // Disable start_at_zero for external graphical subs
                     if (!(state.SubtitleStream.IsExternal && !state.SubtitleStream.IsTextSubtitleStream))
@@ -1883,7 +1883,7 @@ namespace Jellyfin.Api.Controllers
             var segmentExists = System.IO.File.Exists(segmentPath);
             if (segmentExists)
             {
-                if (transcodingJob != null && transcodingJob.HasExited)
+                if (transcodingJob is not null && transcodingJob.HasExited)
                 {
                     // Transcoding job is over, so assume all existing files are ready
                     _logger.LogDebug("serving up {0} as transcode is over", segmentPath);
@@ -1901,7 +1901,7 @@ namespace Jellyfin.Api.Controllers
             }
 
             var nextSegmentPath = GetSegmentPath(state, playlistPath, segmentIndex + 1);
-            if (transcodingJob != null)
+            if (transcodingJob is not null)
             {
                 while (!cancellationToken.IsCancellationRequested && !transcodingJob.HasExited)
                 {
@@ -1953,7 +1953,7 @@ namespace Jellyfin.Api.Controllers
             Response.OnCompleted(() =>
             {
                 _logger.LogDebug("Finished serving {SegmentPath}", segmentPath);
-                if (transcodingJob != null)
+                if (transcodingJob is not null)
                 {
                     transcodingJob.DownloadPositionTicks = Math.Max(transcodingJob.DownloadPositionTicks ?? segmentEndingPositionTicks, segmentEndingPositionTicks);
                     _transcodingJobHelper.OnTranscodeEndRequest(transcodingJob);
@@ -2011,7 +2011,7 @@ namespace Jellyfin.Api.Controllers
         {
             var file = GetLastTranscodingFile(playlistPath, segmentExtension, _fileSystem);
 
-            if (file != null)
+            if (file is not null)
             {
                 DeleteFile(file.FullName, retryCount);
             }

Jellyfin.Api/Controllers/HlsSegmentController.cs

@@ -178,7 +178,7 @@ namespace Jellyfin.Api.Controllers
 
             Response.OnCompleted(() =>
             {
-                if (transcodingJob != null)
+                if (transcodingJob is not null)
                 {
                     _transcodingJobHelper.OnTranscodeEndRequest(transcodingJob);
                 }

Jellyfin.Api/Controllers/ImageController.cs

@@ -110,7 +110,7 @@ namespace Jellyfin.Api.Controllers
             // Handle image/png; charset=utf-8
             var mimeType = Request.ContentType?.Split(';').FirstOrDefault();
             var userDataPath = Path.Combine(_serverConfigurationManager.ApplicationPaths.UserConfigurationDirectoryPath, user.Username);
-            if (user.ProfileImage != null)
+            if (user.ProfileImage is not null)
             {
                 await _userManager.ClearProfileImageAsync(user).ConfigureAwait(false);
             }
@@ -157,7 +157,7 @@ namespace Jellyfin.Api.Controllers
             // Handle image/png; charset=utf-8
             var mimeType = Request.ContentType?.Split(';').FirstOrDefault();
             var userDataPath = Path.Combine(_serverConfigurationManager.ApplicationPaths.UserConfigurationDirectoryPath, user.Username);
-            if (user.ProfileImage != null)
+            if (user.ProfileImage is not null)
             {
                 await _userManager.ClearProfileImageAsync(user).ConfigureAwait(false);
             }
@@ -452,7 +452,7 @@ namespace Jellyfin.Api.Controllers
                 {
                     var info = GetImageInfo(item, image, null);
 
-                    if (info != null)
+                    if (info is not null)
                     {
                         list.Add(info);
                     }
@@ -470,7 +470,7 @@ namespace Jellyfin.Api.Controllers
                 {
                     var info = GetImageInfo(item, image, index);
 
-                    if (info != null)
+                    if (info is not null)
                     {
                         list.Add(info);
                     }
@@ -1968,7 +1968,7 @@ namespace Jellyfin.Api.Controllers
                 { "realTimeInfo.dlna.org", "DLNA.ORG_TLAG=*" }
             };
 
-            if (!imageInfo.IsLocalFile && item != null)
+            if (!imageInfo.IsLocalFile && item is not null)
             {
                 imageInfo = await _libraryManager.ConvertImageToLocal(item, imageInfo, imageIndex ?? 0).ConfigureAwait(false);
             }

Jellyfin.Api/Controllers/ItemUpdateController.cs

@@ -80,13 +80,13 @@ namespace Jellyfin.Api.Controllers
             var isLockedChanged = item.IsLocked != newLockData;
 
             var series = item as Series;
-            var displayOrderChanged = series != null && !string.Equals(
+            var displayOrderChanged = series is not null && !string.Equals(
                 series.DisplayOrder ?? string.Empty,
                 request.DisplayOrder ?? string.Empty,
                 StringComparison.OrdinalIgnoreCase);
 
             // Do this first so that metadata savers can pull the updates from the database.
-            if (request.People != null)
+            if (request.People is not null)
             {
                 _libraryManager.UpdatePeople(
                     item,
@@ -248,12 +248,12 @@ namespace Jellyfin.Api.Controllers
 
             item.Tags = request.Tags;
 
-            if (request.Taglines != null)
+            if (request.Taglines is not null)
             {
                 item.Tagline = request.Taglines.FirstOrDefault();
             }
 
-            if (request.Studios != null)
+            if (request.Studios is not null)
             {
                 item.Studios = request.Studios.Select(x => x.Name).ToArray();
             }
@@ -269,7 +269,7 @@ namespace Jellyfin.Api.Controllers
             item.OfficialRating = string.IsNullOrWhiteSpace(request.OfficialRating) ? null : request.OfficialRating;
             item.CustomRating = request.CustomRating;
 
-            if (request.ProductionLocations != null)
+            if (request.ProductionLocations is not null)
             {
                 item.ProductionLocations = request.ProductionLocations;
             }
@@ -289,7 +289,7 @@ namespace Jellyfin.Api.Controllers
 
             item.IsLocked = request.LockData ?? false;
 
-            if (request.LockedFields != null)
+            if (request.LockedFields is not null)
             {
                 item.LockedFields = request.LockedFields;
             }
@@ -315,7 +315,7 @@ namespace Jellyfin.Api.Controllers
                 video.Video3DFormat = request.Video3DFormat;
             }
 
-            if (request.AlbumArtists != null)
+            if (request.AlbumArtists is not null)
             {
                 if (item is IHasAlbumArtist hasAlbumArtists)
                 {
@@ -326,7 +326,7 @@ namespace Jellyfin.Api.Controllers
                 }
             }
 
-            if (request.ArtistItems != null)
+            if (request.ArtistItems is not null)
             {
                 if (item is IHasArtist hasArtists)
                 {
@@ -349,7 +349,7 @@ namespace Jellyfin.Api.Controllers
                 {
                     series.Status = GetSeriesStatus(request);
 
-                    if (request.AirDays != null)
+                    if (request.AirDays is not null)
                     {
                         series.AirDays = request.AirDays;
                         series.AirTime = request.AirTime;

Jellyfin.Api/Controllers/ItemsController.cs

@@ -447,7 +447,7 @@ namespace Jellyfin.Api.Controllers
                         {
                             return null;
                         }
-                    }).Where(i => i != null).Select(i => i!.Id).ToArray();
+                    }).Where(i => i is not null).Select(i => i!.Id).ToArray();
                 }
 
                 // ExcludeArtistIds
@@ -483,7 +483,7 @@ namespace Jellyfin.Api.Controllers
                         {
                             return null;
                         }
-                    }).Where(i => i != null).Select(i => i!.Id).ToArray();
+                    }).Where(i => i is not null).Select(i => i!.Id).ToArray();
                 }
 
                 // Apply default sorting if none requested
@@ -837,7 +837,7 @@ namespace Jellyfin.Api.Controllers
             if (excludeActiveSessions)
             {
                 excludeItemIds = _sessionManager.Sessions
-                    .Where(s => s.UserId.Equals(userId) && s.NowPlayingItem != null)
+                    .Where(s => s.UserId.Equals(userId) && s.NowPlayingItem is not null)
                     .Select(s => s.NowPlayingItem.Id)
                     .ToArray();
             }

Jellyfin.Api/Controllers/LibraryController.cs

@@ -449,9 +449,9 @@ namespace Jellyfin.Api.Controllers
             var dtoOptions = new DtoOptions().AddClientFields(User);
             BaseItem? parent = item.GetParent();
 
-            while (parent != null)
+            while (parent is not null)
             {
-                if (user != null)
+                if (user is not null)
                 {
                     parent = TranslateParentItem(parent, user);
                 }
@@ -617,7 +617,7 @@ namespace Jellyfin.Api.Controllers
 
             var user = _userManager.GetUserById(User.GetUserId());
 
-            if (user != null)
+            if (user is not null)
             {
                 if (!item.CanDownload(user))
                 {
@@ -632,7 +632,7 @@ namespace Jellyfin.Api.Controllers
                 }
             }
 
-            if (user != null)
+            if (user is not null)
             {
                 await LogDownloadAsync(item, user).ConfigureAwait(false);
             }
@@ -686,8 +686,8 @@ namespace Jellyfin.Api.Controllers
                 .AddClientFields(User);
 
             var program = item as IHasProgramAttributes;
-            bool? isMovie = item is Movie || (program != null && program.IsMovie) || item is Trailer;
+            bool? isMovie = item is Movie || (program is not null && program.IsMovie) || item is Trailer;
-            bool? isSeries = item is Series || (program != null && program.IsSeries);
+            bool? isSeries = item is Series || (program is not null && program.IsSeries);
 
             var includeItemTypes = new List<BaseItemKind>();
             if (isMovie.Value)

Jellyfin.Api/Controllers/LibraryStructureController.cs

@@ -82,7 +82,7 @@ namespace Jellyfin.Api.Controllers
         {
             var libraryOptions = libraryOptionsDto?.LibraryOptions ?? new LibraryOptions();
 
-            if (paths != null && paths.Length > 0)
+            if (paths is not null && paths.Length > 0)
             {
                 libraryOptions.PathInfos = paths.Select(i => new MediaPathInfo(i)).ToArray();
             }

Jellyfin.Api/Controllers/MediaInfoController.cs

@@ -124,7 +124,7 @@ namespace Jellyfin.Api.Controllers
             if (profile is null)
             {
                 var caps = _deviceManager.GetCapabilities(User.GetDeviceId());
-                if (caps != null)
+                if (caps is not null)
                 {
                     profile = caps.DeviceProfile;
                 }
@@ -154,12 +154,12 @@ namespace Jellyfin.Api.Controllers
                     liveStreamId)
                 .ConfigureAwait(false);
 
-            if (info.ErrorCode != null)
+            if (info.ErrorCode is not null)
             {
                 return info;
             }
 
-            if (profile != null)
+            if (profile is not null)
             {
                 // set device specific data
                 var item = _libraryManager.GetItemById(itemId);
@@ -194,7 +194,7 @@ namespace Jellyfin.Api.Controllers
             {
                 var mediaSource = string.IsNullOrWhiteSpace(mediaSourceId) ? info.MediaSources[0] : info.MediaSources.FirstOrDefault(i => string.Equals(i.Id, mediaSourceId, StringComparison.Ordinal));
 
-                if (mediaSource != null && mediaSource.RequiresOpening && string.IsNullOrWhiteSpace(mediaSource.LiveStreamId))
+                if (mediaSource is not null && mediaSource.RequiresOpening && string.IsNullOrWhiteSpace(mediaSource.LiveStreamId))
                 {
                     var openStreamResult = await _mediaInfoHelper.OpenMediaSource(
                         HttpContext,

Jellyfin.Api/Controllers/PluginsController.cs

@@ -148,7 +148,7 @@ namespace Jellyfin.Api.Controllers
             // Select the un-instanced one first.
             var plugin = plugins.FirstOrDefault(p => p.Instance is null) ?? plugins.OrderBy(p => p.Manifest.Status).FirstOrDefault();
 
-            if (plugin != null)
+            if (plugin is not null)
             {
                 _installationManager.UninstallPlugin(plugin);
                 return NoContent();
@@ -202,7 +202,7 @@ namespace Jellyfin.Api.Controllers
             var configuration = (BasePluginConfiguration?)await JsonSerializer.DeserializeAsync(Request.Body, configPlugin.ConfigurationType, _serializerOptions)
                 .ConfigureAwait(false);
 
-            if (configuration != null)
+            if (configuration is not null)
             {
                 configPlugin.UpdateConfiguration(configuration);
             }
@@ -254,7 +254,7 @@ namespace Jellyfin.Api.Controllers
         {
             var plugin = _pluginManager.GetPlugin(pluginId);
 
-            if (plugin != null)
+            if (plugin is not null)
             {
                 return plugin.Manifest;
             }

Jellyfin.Api/Controllers/SearchController.cs

@@ -161,7 +161,7 @@ namespace Jellyfin.Api.Controllers
 
             var primaryImageTag = _imageProcessor.GetImageCacheTag(item, ImageType.Primary);
 
-            if (primaryImageTag != null)
+            if (primaryImageTag is not null)
             {
                 result.PrimaryImageTag = primaryImageTag;
                 result.PrimaryImageAspectRatio = _dtoService.GetPrimaryImageAspectRatio(item);
@@ -195,7 +195,7 @@ namespace Jellyfin.Api.Controllers
 
                     MusicAlbum musicAlbum = song.AlbumEntity;
 
-                    if (musicAlbum != null)
+                    if (musicAlbum is not null)
                     {
                         result.Album = musicAlbum.Name;
                         result.AlbumId = musicAlbum.Id;
@@ -228,11 +228,11 @@ namespace Jellyfin.Api.Controllers
 
             itemWithImage ??= GetParentWithImage<BaseItem>(item, ImageType.Thumb);
 
-            if (itemWithImage != null)
+            if (itemWithImage is not null)
             {
                 var tag = _imageProcessor.GetImageCacheTag(itemWithImage, ImageType.Thumb);
 
-                if (tag != null)
+                if (tag is not null)
                 {
                     hint.ThumbImageTag = tag;
                     hint.ThumbImageItemId = itemWithImage.Id.ToString("N", CultureInfo.InvariantCulture);
@@ -245,11 +245,11 @@ namespace Jellyfin.Api.Controllers
             var itemWithImage = (item.HasImage(ImageType.Backdrop) ? item : null)
                 ?? GetParentWithImage<BaseItem>(item, ImageType.Backdrop);
 
-            if (itemWithImage != null)
+            if (itemWithImage is not null)
             {
                 var tag = _imageProcessor.GetImageCacheTag(itemWithImage, ImageType.Backdrop);
 
-                if (tag != null)
+                if (tag is not null)
                 {
                     hint.BackdropImageTag = tag;
                     hint.BackdropImageItemId = itemWithImage.Id.ToString("N", CultureInfo.InvariantCulture);

Jellyfin.Api/Controllers/StartupController.cs

@@ -132,7 +132,7 @@ namespace Jellyfin.Api.Controllers
         {
             var user = _userManager.Users.First();
 
-            if (startupUserDto.Name != null)
+            if (startupUserDto.Name is not null)
             {
                 user.Username = startupUserDto.Name;
             }

Jellyfin.Api/Controllers/SubtitleController.cs

@@ -522,7 +522,7 @@ namespace Jellyfin.Api.Controllers
                     .First(i => string.Equals(i.Name, name, StringComparison.OrdinalIgnoreCase));
                 var fileSize = fontFile?.Length;
 
-                if (fontFile != null && fileSize != null && fileSize > 0)
+                if (fontFile is not null && fileSize is not null && fileSize > 0)
                 {
                     _logger.LogDebug("Fallback font size is {FileSize} Bytes", fileSize);
                     return PhysicalFile(fontFile.FullName, MimeTypes.GetMimeType(fontFile.FullName));

Jellyfin.Api/Controllers/UserController.cs

@@ -477,7 +477,7 @@ namespace Jellyfin.Api.Controllers
             var newUser = await _userManager.CreateUserAsync(request.Name).ConfigureAwait(false);
 
             // no need to authenticate password for new user
-            if (request.Password != null)
+            if (request.Password is not null)
             {
                 await _userManager.ChangePassword(newUser, request.Password).ConfigureAwait(false);
             }

Jellyfin.Api/Controllers/UserLibraryController.cs

@@ -306,7 +306,7 @@ namespace Jellyfin.Api.Controllers
                 var item = i.Item2[0];
                 var childCount = 0;
 
-                if (i.Item1 != null && (i.Item2.Count > 1 || i.Item1 is MusicAlbum))
+                if (i.Item1 is not null && (i.Item2.Count > 1 || i.Item1 is MusicAlbum))
                 {
                     item = i.Item1;
                     childCount = i.Item2.Count;

Jellyfin.Api/Controllers/VideosController.cs

@@ -439,7 +439,7 @@ namespace Jellyfin.Api.Controllers
                     cancellationTokenSource.Token)
                 .ConfigureAwait(false);
 
-            if (@static.HasValue && @static.Value && state.DirectStreamProvider != null)
+            if (@static.HasValue && @static.Value && state.DirectStreamProvider is not null)
             {
                 StreamingHelpers.AddDlnaHeaders(state, Response.Headers, true, state.Request.StartTimeTicks, Request, _dlnaManager);
 
@@ -472,7 +472,7 @@ namespace Jellyfin.Api.Controllers
             var outputPathExists = System.IO.File.Exists(outputPath);
 
             var transcodingJob = _transcodingJobHelper.GetTranscodingJob(outputPath, TranscodingJobType.Progressive);
-            var isTranscodeCached = outputPathExists && transcodingJob != null;
+            var isTranscodeCached = outputPathExists && transcodingJob is not null;
 
             StreamingHelpers.AddDlnaHeaders(state, Response.Headers, (@static.HasValue && @static.Value) || isTranscodeCached, state.Request.StartTimeTicks, Request, _dlnaManager);
 

Jellyfin.Api/Controllers/YearsController.cs

@@ -152,7 +152,7 @@ namespace Jellyfin.Api.Controllers
             var result = new QueryResult<BaseItemDto>(
                 startIndex,
                 ibnItemsArray.Count,
-                dtos.Where(i => i != null).ToArray());
+                dtos.Where(i => i is not null).ToArray());
             return result;
         }
 

Jellyfin.Api/Helpers/AudioHelper.cs

@@ -111,7 +111,7 @@ namespace Jellyfin.Api.Helpers
                     cancellationTokenSource.Token)
                 .ConfigureAwait(false);
 
-            if (streamingRequest.Static && state.DirectStreamProvider != null)
+            if (streamingRequest.Static && state.DirectStreamProvider is not null)
             {
                 StreamingHelpers.AddDlnaHeaders(state, _httpContextAccessor.HttpContext.Response.Headers, true, streamingRequest.StartTimeTicks, _httpContextAccessor.HttpContext.Request, _dlnaManager);
 
@@ -144,7 +144,7 @@ namespace Jellyfin.Api.Helpers
             var outputPathExists = File.Exists(outputPath);
 
             var transcodingJob = _transcodingJobHelper.GetTranscodingJob(outputPath, TranscodingJobType.Progressive);
-            var isTranscodeCached = outputPathExists && transcodingJob != null;
+            var isTranscodeCached = outputPathExists && transcodingJob is not null;
 
             StreamingHelpers.AddDlnaHeaders(state, _httpContextAccessor.HttpContext.Response.Headers, streamingRequest.Static || isTranscodeCached, streamingRequest.StartTimeTicks, _httpContextAccessor.HttpContext.Request, _dlnaManager);