diff --git a/Emby.Dlna/Didl/Filter.cs b/Emby.Dlna/Didl/Filter.cs
index d703f043eb..6db6f3ae30 100644
--- a/Emby.Dlna/Didl/Filter.cs
+++ b/Emby.Dlna/Didl/Filter.cs
@@ -17,8 +17,7 @@ namespace Emby.Dlna.Didl
         public Filter(string filter)
         {
             _all = string.Equals(filter, "*", StringComparison.OrdinalIgnoreCase);
-
-            _fields = (filter ?? string.Empty).Split(',', StringSplitOptions.RemoveEmptyEntries);
+            _fields = filter.Split(',', StringSplitOptions.RemoveEmptyEntries);
         }
 
         public bool Contains(string field)
diff --git a/Emby.Dlna/PlayTo/Device.cs b/Emby.Dlna/PlayTo/Device.cs
index 0b22880003..34fb8fddd6 100644
--- a/Emby.Dlna/PlayTo/Device.cs
+++ b/Emby.Dlna/PlayTo/Device.cs
@@ -1179,6 +1179,7 @@ namespace Emby.Dlna.PlayTo
             return new Device(deviceProperties, httpClientFactory, logger);
         }
 
+#nullable enable
         private static DeviceIcon CreateIcon(XElement element)
         {
             if (element == null)
@@ -1186,68 +1187,60 @@ namespace Emby.Dlna.PlayTo
                 throw new ArgumentNullException(nameof(element));
             }
 
-            var mimeType = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("mimetype"));
             var width = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("width"));
             var height = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("height"));
-            var depth = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("depth"));
-            var url = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("url"));
 
-            var widthValue = int.Parse(width, NumberStyles.Integer, CultureInfo.InvariantCulture);
-            var heightValue = int.Parse(height, NumberStyles.Integer, CultureInfo.InvariantCulture);
+            _ = int.TryParse(width, NumberStyles.Integer, CultureInfo.InvariantCulture, out var widthValue);
+            _ = int.TryParse(height, NumberStyles.Integer, CultureInfo.InvariantCulture, out var heightValue);
 
             return new DeviceIcon
             {
-                Depth = depth,
+                Depth = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("depth")) ?? string.Empty,
                 Height = heightValue,
-                MimeType = mimeType,
-                Url = url,
+                MimeType = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("mimetype")) ?? string.Empty,
+                Url = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("url")) ?? string.Empty,
                 Width = widthValue
             };
         }
 
         private static DeviceService Create(XElement element)
-        {
-            var type = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("serviceType"));
-            var id = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("serviceId"));
-            var scpdUrl = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("SCPDURL"));
-            var controlURL = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("controlURL"));
-            var eventSubURL = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("eventSubURL"));
-
-            return new DeviceService
-            {
-                ControlUrl = controlURL,
-                EventSubUrl = eventSubURL,
-                ScpdUrl = scpdUrl,
-                ServiceId = id,
-                ServiceType = type
+            => new DeviceService()
+            {
+                ControlUrl = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("controlURL")) ?? string.Empty,
+                EventSubUrl = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("eventSubURL")) ?? string.Empty,
+                ScpdUrl = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("SCPDURL")) ?? string.Empty,
+                ServiceId = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("serviceId")) ?? string.Empty,
+                ServiceType = element.GetDescendantValue(UPnpNamespaces.Ud.GetName("serviceType")) ?? string.Empty
             };
-        }
 
-        private void UpdateMediaInfo(UBaseObject mediaInfo, TransportState state)
+        private void UpdateMediaInfo(UBaseObject? mediaInfo, TransportState state)
         {
             TransportState = state;
 
             var previousMediaInfo = CurrentMediaInfo;
             CurrentMediaInfo = mediaInfo;
 
-            if (previousMediaInfo == null && mediaInfo != null)
+            if (mediaInfo == null)
             {
-                if (state != TransportState.Stopped)
+                if (previousMediaInfo != null)
                 {
-                    OnPlaybackStart(mediaInfo);
+                    OnPlaybackStop(previousMediaInfo);
                 }
             }
-            else if (mediaInfo != null && previousMediaInfo != null && !mediaInfo.Equals(previousMediaInfo))
+            else if (previousMediaInfo == null)
             {
-                OnMediaChanged(previousMediaInfo, mediaInfo);
+                if (state != TransportState.Stopped)
+                {
+                    OnPlaybackStart(mediaInfo);
+                }
             }
-            else if (mediaInfo == null && previousMediaInfo != null)
+            else if (mediaInfo.Equals(previousMediaInfo))
             {
-                OnPlaybackStop(previousMediaInfo);
+                OnPlaybackProgress(mediaInfo);
             }
-            else if (mediaInfo != null && mediaInfo.Equals(previousMediaInfo))
+            else
             {
-                OnPlaybackProgress(mediaInfo);
+                OnMediaChanged(previousMediaInfo, mediaInfo);
             }
         }
 
diff --git a/Emby.Dlna/PlayTo/PlayToController.cs b/Emby.Dlna/PlayTo/PlayToController.cs
index f25d8017ef..d0c9df68e3 100644
--- a/Emby.Dlna/PlayTo/PlayToController.cs
+++ b/Emby.Dlna/PlayTo/PlayToController.cs
@@ -210,9 +210,9 @@ namespace Emby.Dlna.PlayTo
 
                 var mediaSource = await streamInfo.GetMediaSource(CancellationToken.None).ConfigureAwait(false);
 
-                var duration = mediaSource == null ?
-                    (_device.Duration == null ? (long?)null : _device.Duration.Value.Ticks) :
-                    mediaSource.RunTimeTicks;
+                var duration = mediaSource == null
+                    ? _device.Duration?.Ticks
+                    : mediaSource.RunTimeTicks;
 
                 var playedToCompletion = positionTicks.HasValue && positionTicks.Value == 0;
 
diff --git a/Emby.Dlna/PlayTo/TransportCommands.cs b/Emby.Dlna/PlayTo/TransportCommands.cs
index b58669355d..d373b57f55 100644
--- a/Emby.Dlna/PlayTo/TransportCommands.cs
+++ b/Emby.Dlna/PlayTo/TransportCommands.cs
@@ -175,7 +175,7 @@ namespace Emby.Dlna.PlayTo
                 var sendValue = state.AllowedValues.FirstOrDefault(a => string.Equals(a, commandParameter, StringComparison.OrdinalIgnoreCase)) ??
                     (state.AllowedValues.Count > 0 ? state.AllowedValues[0] : value);
 
-                return string.Format(CultureInfo.InvariantCulture, "<{0} xmlns:dt=\"urn:schemas-microsoft-com:datatypes\" dt:dt=\"{1}\">{2}</{0}>", argument.Name, state.DataType ?? "string", sendValue);
+                return string.Format(CultureInfo.InvariantCulture, "<{0} xmlns:dt=\"urn:schemas-microsoft-com:datatypes\" dt:dt=\"{1}\">{2}</{0}>", argument.Name, state.DataType, sendValue);
             }
 
             return string.Format(CultureInfo.InvariantCulture, "<{0}>{1}</{0}>", argument.Name, value);
diff --git a/Emby.Dlna/Profiles/DefaultProfile.cs b/Emby.Dlna/Profiles/DefaultProfile.cs
index 8eaf12ba9a..8f4f2bd384 100644
--- a/Emby.Dlna/Profiles/DefaultProfile.cs
+++ b/Emby.Dlna/Profiles/DefaultProfile.cs
@@ -167,8 +167,7 @@ namespace Emby.Dlna.Profiles
 
         public void AddXmlRootAttribute(string name, string value)
         {
-            var atts = XmlRootAttributes ?? System.Array.Empty<XmlAttribute>();
-            var list = atts.ToList();
+            var list = XmlRootAttributes.ToList();
 
             list.Add(new XmlAttribute
             {
diff --git a/Emby.Dlna/Server/DescriptionXmlBuilder.cs b/Emby.Dlna/Server/DescriptionXmlBuilder.cs
index 80a45f2b25..8adaaea77e 100644
--- a/Emby.Dlna/Server/DescriptionXmlBuilder.cs
+++ b/Emby.Dlna/Server/DescriptionXmlBuilder.cs
@@ -189,7 +189,7 @@ namespace Emby.Dlna.Server
                 builder.Append("<icon>");
 
                 builder.Append("<mimetype>")
-                    .Append(SecurityElement.Escape(icon.MimeType ?? string.Empty))
+                    .Append(SecurityElement.Escape(icon.MimeType))
                     .Append("</mimetype>");
                 builder.Append("<width>")
                     .Append(SecurityElement.Escape(icon.Width.ToString(CultureInfo.InvariantCulture)))
@@ -198,7 +198,7 @@ namespace Emby.Dlna.Server
                     .Append(SecurityElement.Escape(icon.Height.ToString(CultureInfo.InvariantCulture)))
                     .Append("</height>");
                 builder.Append("<depth>")
-                    .Append(SecurityElement.Escape(icon.Depth ?? string.Empty))
+                    .Append(SecurityElement.Escape(icon.Depth))
                     .Append("</depth>");
                 builder.Append("<url>")
                     .Append(BuildUrl(icon.Url))
@@ -219,10 +219,10 @@ namespace Emby.Dlna.Server
                 builder.Append("<service>");
 
                 builder.Append("<serviceType>")
-                    .Append(SecurityElement.Escape(service.ServiceType ?? string.Empty))
+                    .Append(SecurityElement.Escape(service.ServiceType))
                     .Append("</serviceType>");
                 builder.Append("<serviceId>")
-                    .Append(SecurityElement.Escape(service.ServiceId ?? string.Empty))
+                    .Append(SecurityElement.Escape(service.ServiceId))
                     .Append("</serviceId>");
                 builder.Append("<SCPDURL>")
                     .Append(BuildUrl(service.ScpdUrl))
diff --git a/Emby.Dlna/Service/ServiceXmlBuilder.cs b/Emby.Dlna/Service/ServiceXmlBuilder.cs
index 1e56d09b29..6e0bc6ad8b 100644
--- a/Emby.Dlna/Service/ServiceXmlBuilder.cs
+++ b/Emby.Dlna/Service/ServiceXmlBuilder.cs
@@ -38,7 +38,7 @@ namespace Emby.Dlna.Service
                 builder.Append("<action>");
 
                 builder.Append("<name>")
-                    .Append(SecurityElement.Escape(item.Name ?? string.Empty))
+                    .Append(SecurityElement.Escape(item.Name))
                     .Append("</name>");
 
                 builder.Append("<argumentList>");
@@ -48,13 +48,13 @@ namespace Emby.Dlna.Service
                     builder.Append("<argument>");
 
                     builder.Append("<name>")
-                        .Append(SecurityElement.Escape(argument.Name ?? string.Empty))
+                        .Append(SecurityElement.Escape(argument.Name))
                         .Append("</name>");
                     builder.Append("<direction>")
-                        .Append(SecurityElement.Escape(argument.Direction ?? string.Empty))
+                        .Append(SecurityElement.Escape(argument.Direction))
                         .Append("</direction>");
                     builder.Append("<relatedStateVariable>")
-                        .Append(SecurityElement.Escape(argument.RelatedStateVariable ?? string.Empty))
+                        .Append(SecurityElement.Escape(argument.RelatedStateVariable))
                         .Append("</relatedStateVariable>");
 
                     builder.Append("</argument>");
@@ -81,10 +81,10 @@ namespace Emby.Dlna.Service
                     .Append("\">");
 
                 builder.Append("<name>")
-                    .Append(SecurityElement.Escape(item.Name ?? string.Empty))
+                    .Append(SecurityElement.Escape(item.Name))
                     .Append("</name>");
                 builder.Append("<dataType>")
-                    .Append(SecurityElement.Escape(item.DataType ?? string.Empty))
+                    .Append(SecurityElement.Escape(item.DataType))
                     .Append("</dataType>");
 
                 if (item.AllowedValues.Count > 0)
diff --git a/Emby.Drawing/ImageProcessor.cs b/Emby.Drawing/ImageProcessor.cs
index 8ea711abe2..c9847aa2d8 100644
--- a/Emby.Drawing/ImageProcessor.cs
+++ b/Emby.Drawing/ImageProcessor.cs
@@ -242,7 +242,7 @@ namespace Emby.Drawing
             return ImageFormat.Jpg;
         }
 
-        private string? GetMimeType(ImageFormat format, string path)
+        private string GetMimeType(ImageFormat format, string path)
             => format switch
             {
                 ImageFormat.Bmp => MimeTypes.GetMimeType("i.bmp"),
diff --git a/Emby.Naming/TV/SeriesPathParser.cs b/Emby.Naming/TV/SeriesPathParser.cs
index 4dfbb36a37..23067e6a44 100644
--- a/Emby.Naming/TV/SeriesPathParser.cs
+++ b/Emby.Naming/TV/SeriesPathParser.cs
@@ -50,7 +50,7 @@ namespace Emby.Naming.TV
                 if (expression.IsNamed)
                 {
                     result.SeriesName = match.Groups["seriesname"].Value;
-                    result.Success = !string.IsNullOrEmpty(result.SeriesName) && !string.IsNullOrEmpty(match.Groups["seasonnumber"]?.Value);
+                    result.Success = !string.IsNullOrEmpty(result.SeriesName) && !match.Groups["seasonnumber"].ValueSpan.IsEmpty;
                 }
             }
 
diff --git a/Emby.Notifications/CoreNotificationTypes.cs b/Emby.Notifications/CoreNotificationTypes.cs
index ec3490e23b..35aac3a11c 100644
--- a/Emby.Notifications/CoreNotificationTypes.cs
+++ b/Emby.Notifications/CoreNotificationTypes.cs
@@ -24,63 +24,63 @@ namespace Emby.Notifications
             {
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.ApplicationUpdateInstalled.ToString()
+                     Type = nameof(NotificationType.ApplicationUpdateInstalled)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.InstallationFailed.ToString()
+                     Type = nameof(NotificationType.InstallationFailed)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.PluginInstalled.ToString()
+                     Type = nameof(NotificationType.PluginInstalled)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.PluginError.ToString()
+                     Type = nameof(NotificationType.PluginError)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.PluginUninstalled.ToString()
+                     Type = nameof(NotificationType.PluginUninstalled)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.PluginUpdateInstalled.ToString()
+                     Type = nameof(NotificationType.PluginUpdateInstalled)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.ServerRestartRequired.ToString()
+                     Type = nameof(NotificationType.ServerRestartRequired)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.TaskFailed.ToString()
+                     Type = nameof(NotificationType.TaskFailed)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.NewLibraryContent.ToString()
+                     Type = nameof(NotificationType.NewLibraryContent)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.AudioPlayback.ToString()
+                     Type = nameof(NotificationType.AudioPlayback)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.VideoPlayback.ToString()
+                     Type = nameof(NotificationType.VideoPlayback)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.AudioPlaybackStopped.ToString()
+                     Type = nameof(NotificationType.AudioPlaybackStopped)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.VideoPlaybackStopped.ToString()
+                     Type = nameof(NotificationType.VideoPlaybackStopped)
                 },
                 new NotificationTypeInfo
                 {
-                     Type = NotificationType.UserLockedOut.ToString()
+                     Type = nameof(NotificationType.UserLockedOut)
                 },
                 new NotificationTypeInfo
                 {
-                    Type = NotificationType.ApplicationUpdateAvailable.ToString()
+                    Type = nameof(NotificationType.ApplicationUpdateAvailable)
                 }
             };
 
@@ -98,7 +98,7 @@ namespace Emby.Notifications
 
         private void Update(NotificationTypeInfo note)
         {
-            note.Name = _localization.GetLocalizedString("NotificationOption" + note.Type) ?? note.Type;
+            note.Name = _localization.GetLocalizedString("NotificationOption" + note.Type);
 
             note.IsBasedOnUserEvent = note.Type.IndexOf("Playback", StringComparison.OrdinalIgnoreCase) != -1;
 
diff --git a/Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs b/Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs
index 5ba4749a60..19fe0b1085 100644
--- a/Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs
+++ b/Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs
@@ -371,7 +371,7 @@ namespace Emby.Server.Implementations.AppBase
                 NewConfiguration = configuration
             });
 
-            _configurations.AddOrUpdate(key, configuration, (k, v) => configuration);
+            _configurations.AddOrUpdate(key, configuration, (_, _) => configuration);
 
             var path = GetConfigurationFile(key);
             Directory.CreateDirectory(Path.GetDirectoryName(path));
diff --git a/Emby.Server.Implementations/Data/SqliteItemRepository.cs b/Emby.Server.Implementations/Data/SqliteItemRepository.cs
index 7fafbc9bea..a6b48b2120 100644
--- a/Emby.Server.Implementations/Data/SqliteItemRepository.cs
+++ b/Emby.Server.Implementations/Data/SqliteItemRepository.cs
@@ -282,8 +282,6 @@ namespace Emby.Server.Implementations.Data
             typeof(AggregateFolder)
         };
 
-        private readonly Dictionary<string, string> _types = GetTypeMapDictionary();
-
         private static readonly Dictionary<BaseItemKind, string> _baseItemKindNames = new()
         {
             { BaseItemKind.AggregateFolder, typeof(AggregateFolder).FullName },
@@ -3440,11 +3438,6 @@ namespace Emby.Server.Implementations.Data
             return true;
         }
 
-        private bool IsValidType(string value)
-        {
-            return IsAlphaNumeric(value);
-        }
-
         private bool IsValidMediaType(string value)
         {
             return IsAlphaNumeric(value);
@@ -4711,7 +4704,7 @@ namespace Emby.Server.Implementations.Data
                 if (statement == null)
                 {
                     int index = 0;
-                    string excludedTags = string.Join(',', query.ExcludeInheritedTags.Select(t => paramName + index++));
+                    string excludedTags = string.Join(',', query.ExcludeInheritedTags.Select(_ => paramName + index++));
                     whereClauses.Add("((select CleanValue from itemvalues where ItemId=Guid and Type=6 and cleanvalue in (" + excludedTags + ")) is null)");
                 }
                 else
@@ -4968,21 +4961,6 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             }
         }
 
-        private static Dictionary<string, string> GetTypeMapDictionary()
-        {
-            var dict = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
-
-            foreach (var t in _knownTypes)
-            {
-                dict[t.Name] = t.FullName;
-            }
-
-            dict["Program"] = typeof(LiveTvProgram).FullName;
-            dict["TvChannel"] = typeof(LiveTvChannel).FullName;
-
-            return dict;
-        }
-
         public void DeleteItem(Guid id)
         {
             if (id == Guid.Empty)
diff --git a/Emby.Server.Implementations/Devices/DeviceId.cs b/Emby.Server.Implementations/Devices/DeviceId.cs
index 0cfced8beb..b3f5549bcd 100644
--- a/Emby.Server.Implementations/Devices/DeviceId.cs
+++ b/Emby.Server.Implementations/Devices/DeviceId.cs
@@ -37,7 +37,7 @@ namespace Emby.Server.Implementations.Devices
                 {
                     var value = File.ReadAllText(CachePath, Encoding.UTF8);
 
-                    if (Guid.TryParse(value, out var guid))
+                    if (Guid.TryParse(value, out _))
                     {
                         return value;
                     }
diff --git a/Emby.Server.Implementations/Dto/DtoService.cs b/Emby.Server.Implementations/Dto/DtoService.cs
index a6406827cc..7ba34e74af 100644
--- a/Emby.Server.Implementations/Dto/DtoService.cs
+++ b/Emby.Server.Implementations/Dto/DtoService.cs
@@ -109,7 +109,7 @@ namespace Emby.Server.Implementations.Dto
                             }
                         });
 
-                        SetItemByNameInfo(item, dto, libraryItems, user);
+                        SetItemByNameInfo(item, dto, libraryItems);
                     }
                 }
 
@@ -153,8 +153,7 @@ namespace Emby.Server.Implementations.Dto
                         new DtoOptions(false)
                         {
                             EnableImages = false
-                        }),
-                    user);
+                        }));
             }
 
             return dto;
@@ -311,13 +310,13 @@ namespace Emby.Server.Implementations.Dto
 
             if (taggedItems != null && options.ContainsField(ItemFields.ItemCounts))
             {
-                SetItemByNameInfo(item, dto, taggedItems, user);
+                SetItemByNameInfo(item, dto, taggedItems);
             }
 
             return dto;
         }
 
-        private static void SetItemByNameInfo(BaseItem item, BaseItemDto dto, IList<BaseItem> taggedItems, User user = null)
+        private static void SetItemByNameInfo(BaseItem item, BaseItemDto dto, IList<BaseItem> taggedItems)
         {
             if (item is MusicArtist)
             {
diff --git a/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs b/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs
index 331de45c1e..4a5f723273 100644
--- a/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs
+++ b/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs
@@ -101,7 +101,7 @@ namespace Emby.Server.Implementations.EntryPoints
                 }
             }
 
-            _lastProgressMessageTimes.AddOrUpdate(item.Id, key => DateTime.UtcNow, (key, existing) => DateTime.UtcNow);
+            _lastProgressMessageTimes.AddOrUpdate(item.Id, _ => DateTime.UtcNow, (_, _) => DateTime.UtcNow);
 
             var dict = new Dictionary<string, string>();
             dict["ItemId"] = item.Id.ToString("N", CultureInfo.InvariantCulture);
@@ -144,7 +144,7 @@ namespace Emby.Server.Implementations.EntryPoints
         {
             OnProviderRefreshProgress(sender, new GenericEventArgs<Tuple<BaseItem, double>>(new Tuple<BaseItem, double>(e.Argument, 100)));
 
-            _lastProgressMessageTimes.TryRemove(e.Argument.Id, out DateTime removed);
+            _lastProgressMessageTimes.TryRemove(e.Argument.Id, out _);
         }
 
         private static bool EnableRefreshMessage(BaseItem item)
@@ -423,7 +423,6 @@ namespace Emby.Server.Implementations.EntryPoints
                     continue;
                 }
 
-                var collectionFolders = _libraryManager.GetCollectionFolders(item, allUserRootChildren);
                 foreach (var folder in allUserRootChildren)
                 {
                     list.Add(folder.Id.ToString("N", CultureInfo.InvariantCulture));
diff --git a/Emby.Server.Implementations/EntryPoints/UserDataChangeNotifier.cs b/Emby.Server.Implementations/EntryPoints/UserDataChangeNotifier.cs
index d3bcd5e13e..82c8d3ab6d 100644
--- a/Emby.Server.Implementations/EntryPoints/UserDataChangeNotifier.cs
+++ b/Emby.Server.Implementations/EntryPoints/UserDataChangeNotifier.cs
@@ -95,7 +95,7 @@ namespace Emby.Server.Implementations.EntryPoints
                 var changes = _changedItems.ToList();
                 _changedItems.Clear();
 
-                var task = SendNotifications(changes, CancellationToken.None);
+                SendNotifications(changes, CancellationToken.None).GetAwaiter().GetResult();
 
                 if (_updateTimer != null)
                 {
diff --git a/Emby.Server.Implementations/HttpServer/Security/SessionContext.cs b/Emby.Server.Implementations/HttpServer/Security/SessionContext.cs
index a7647caf95..bb6041f28a 100644
--- a/Emby.Server.Implementations/HttpServer/Security/SessionContext.cs
+++ b/Emby.Server.Implementations/HttpServer/Security/SessionContext.cs
@@ -47,7 +47,7 @@ namespace Emby.Server.Implementations.HttpServer.Security
         {
             var session = await GetSession(requestContext).ConfigureAwait(false);
 
-            return session == null || session.UserId.Equals(Guid.Empty) ? null : _userManager.GetUserById(session.UserId);
+            return session.UserId.Equals(Guid.Empty) ? null : _userManager.GetUserById(session.UserId);
         }
 
         public Task<User?> GetUser(object requestContext)
diff --git a/Emby.Server.Implementations/IO/FileRefresher.cs b/Emby.Server.Implementations/IO/FileRefresher.cs
index e62361c1e1..6326208f71 100644
--- a/Emby.Server.Implementations/IO/FileRefresher.cs
+++ b/Emby.Server.Implementations/IO/FileRefresher.cs
@@ -217,8 +217,13 @@ namespace Emby.Server.Implementations.IO
         /// <inheritdoc />
         public void Dispose()
         {
-            _disposed = true;
+            if (_disposed)
+            {
+                return;
+            }
+
             DisposeTimer();
+            _disposed = true;
             GC.SuppressFinalize(this);
         }
     }
diff --git a/Emby.Server.Implementations/IO/LibraryMonitor.cs b/Emby.Server.Implementations/IO/LibraryMonitor.cs
index 9fcc7fe59c..657daac3fc 100644
--- a/Emby.Server.Implementations/IO/LibraryMonitor.cs
+++ b/Emby.Server.Implementations/IO/LibraryMonitor.cs
@@ -99,7 +99,7 @@ namespace Emby.Server.Implementations.IO
             // But if we make this delay too high, we risk missing legitimate changes, such as user adding a new file, or hand-editing metadata
             await Task.Delay(45000).ConfigureAwait(false);
 
-            _tempIgnoredPaths.TryRemove(path, out var val);
+            _tempIgnoredPaths.TryRemove(path, out _);
 
             if (refreshPath)
             {
diff --git a/Emby.Server.Implementations/IO/ManagedFileSystem.cs b/Emby.Server.Implementations/IO/ManagedFileSystem.cs
index 777cd2cd46..5c86dbbb7e 100644
--- a/Emby.Server.Implementations/IO/ManagedFileSystem.cs
+++ b/Emby.Server.Implementations/IO/ManagedFileSystem.cs
@@ -544,16 +544,6 @@ namespace Emby.Server.Implementations.IO
         /// <inheritdoc />
         public virtual bool AreEqual(string path1, string path2)
         {
-            if (path1 == null && path2 == null)
-            {
-                return true;
-            }
-
-            if (path1 == null || path2 == null)
-            {
-                return false;
-            }
-
             return string.Equals(
                 NormalizePath(path1),
                 NormalizePath(path2),
diff --git a/Emby.Server.Implementations/Library/LibraryManager.cs b/Emby.Server.Implementations/Library/LibraryManager.cs
index 270264dba8..e30fa7097b 100644
--- a/Emby.Server.Implementations/Library/LibraryManager.cs
+++ b/Emby.Server.Implementations/Library/LibraryManager.cs
@@ -16,7 +16,7 @@ using Emby.Naming.TV;
 using Emby.Naming.Video;
 using Emby.Server.Implementations.Library.Validators;
 using Emby.Server.Implementations.Playlists;
-using Emby.Server.Implementations.ScheduledTasks;
+using Emby.Server.Implementations.ScheduledTasks.Tasks;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
 using Jellyfin.Extensions;
@@ -2678,7 +2678,7 @@ namespace Emby.Server.Implementations.Library
 
             return new ItemLookupInfo
             {
-                Name = VideoResolver.TryCleanString(result.Name, namingOptions, out var newName) ? newName.ToString() : result.Name,
+                Name = VideoResolver.TryCleanString(result.Name, namingOptions, out var newName) ? newName : result.Name,
                 Year = result.Year
             };
         }
diff --git a/Emby.Server.Implementations/Library/LiveStreamHelper.cs b/Emby.Server.Implementations/Library/LiveStreamHelper.cs
index 83acd8e9f2..20624cc7ae 100644
--- a/Emby.Server.Implementations/Library/LiveStreamHelper.cs
+++ b/Emby.Server.Implementations/Library/LiveStreamHelper.cs
@@ -66,11 +66,8 @@ namespace Emby.Server.Implementations.Library
                 {
                     var delayMs = mediaSource.AnalyzeDurationMs ?? 0;
                     delayMs = Math.Max(3000, delayMs);
-                    if (delayMs > 0)
-                    {
-                        _logger.LogInformation("Waiting {0}ms before probing the live stream", delayMs);
-                        await Task.Delay(delayMs, cancellationToken).ConfigureAwait(false);
-                    }
+                    _logger.LogInformation("Waiting {0}ms before probing the live stream", delayMs);
+                    await Task.Delay(delayMs, cancellationToken).ConfigureAwait(false);
                 }
 
                 mediaSource.AnalyzeDurationMs = 3000;
diff --git a/Emby.Server.Implementations/Library/MusicManager.cs b/Emby.Server.Implementations/Library/MusicManager.cs
index d332135647..d35e74e7b3 100644
--- a/Emby.Server.Implementations/Library/MusicManager.cs
+++ b/Emby.Server.Implementations/Library/MusicManager.cs
@@ -103,7 +103,7 @@ namespace Emby.Server.Implementations.Library
 
         public List<BaseItem> GetInstantMixFromItem(BaseItem item, User user, DtoOptions dtoOptions)
         {
-            if (item is MusicGenre genre)
+            if (item is MusicGenre)
             {
                 return GetInstantMixFromGenreIds(new[] { item.Id }, user, dtoOptions);
             }
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
index a9819a3645..da00b9cfa8 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicAlbumResolver.cs
@@ -112,7 +112,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
         /// Determine if the supplied list contains what we should consider music.
         /// </summary>
         private bool ContainsMusic(
-            IEnumerable<FileSystemMetadata> list,
+            ICollection<FileSystemMetadata> list,
             bool allowSubfolders,
             IDirectoryService directoryService)
         {
diff --git a/Emby.Server.Implementations/Library/UserDataManager.cs b/Emby.Server.Implementations/Library/UserDataManager.cs
index bb3034142d..3810a76c45 100644
--- a/Emby.Server.Implementations/Library/UserDataManager.cs
+++ b/Emby.Server.Implementations/Library/UserDataManager.cs
@@ -75,7 +75,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             var cacheKey = GetCacheKey(userId, item.Id);
-            _userData.AddOrUpdate(cacheKey, userData, (k, v) => userData);
+            _userData.AddOrUpdate(cacheKey, userData, (_, _) => userData);
 
             UserDataSaved?.Invoke(this, new UserDataSaveEventArgs
             {
@@ -125,7 +125,7 @@ namespace Emby.Server.Implementations.Library
 
             var cacheKey = GetCacheKey(userId, itemId);
 
-            return _userData.GetOrAdd(cacheKey, k => GetUserDataInternal(userId, keys));
+            return _userData.GetOrAdd(cacheKey, _ => GetUserDataInternal(userId, keys));
         }
 
         private UserItemData GetUserDataInternal(long internalUserId, List<string> keys)
diff --git a/Emby.Server.Implementations/Library/UserViewManager.cs b/Emby.Server.Implementations/Library/UserViewManager.cs
index ab8bc6328d..b00bc72e64 100644
--- a/Emby.Server.Implementations/Library/UserViewManager.cs
+++ b/Emby.Server.Implementations/Library/UserViewManager.cs
@@ -173,7 +173,7 @@ namespace Emby.Server.Implementations.Library
             string viewType,
             string localizationKey,
             string sortName,
-            Jellyfin.Data.Entities.User user,
+            User user,
             string[] presetViews)
         {
             if (parents.Count == 1 && parents.All(i => string.Equals(i.CollectionType, viewType, StringComparison.OrdinalIgnoreCase)))
@@ -359,7 +359,7 @@ namespace Emby.Server.Implementations.Library
                     (ItemSortBy.SortName, SortOrder.Descending),
                     (ItemSortBy.ProductionYear, SortOrder.Descending)
                 },
-                IsFolder = includeItemTypes.Length == 0 ? false : (bool?)null,
+                IsFolder = includeItemTypes.Length == 0 ? false : null,
                 ExcludeItemTypes = excludeItemTypes,
                 IsVirtualItem = false,
                 Limit = limit * 5,
diff --git a/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs b/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
index 7ef93d1669..e7834ffd64 100644
--- a/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
+++ b/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
@@ -398,7 +398,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 }
 
                 result = new EpgChannelData(channels);
-                _epgChannels.AddOrUpdate(info.Id, result, (k, v) => result);
+                _epgChannels.AddOrUpdate(info.Id, result, (_, _) => result);
             }
 
             return result;
@@ -1248,12 +1248,11 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
             var remoteMetadata = await FetchInternetMetadata(timer, CancellationToken.None).ConfigureAwait(false);
             var recordPath = GetRecordingPath(timer, remoteMetadata, out string seriesPath);
-            var recordingStatus = RecordingStatus.New;
-
-            string liveStreamId = null;
 
             var channelItem = _liveTvManager.GetLiveTvChannel(timer, this);
 
+            string liveStreamId = null;
+            RecordingStatus recordingStatus;
             try
             {
                 var allMediaSources = await _mediaSourceManager.GetPlaybackMediaSources(channelItem, null, true, false, CancellationToken.None).ConfigureAwait(false);
@@ -1339,7 +1338,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             TriggerRefresh(recordPath);
             _libraryMonitor.ReportFileSystemChangeComplete(recordPath, false);
 
-            _activeRecordings.TryRemove(timer.Id, out var removed);
+            _activeRecordings.TryRemove(timer.Id, out _);
 
             if (recordingStatus != RecordingStatus.Completed && DateTime.UtcNow < timer.EndDate && timer.RetryCount < 10)
             {
@@ -1937,7 +1936,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                             writer.WriteElementString("title", timer.EpisodeTitle);
                         }
 
-                        var premiereDate = item.PremiereDate ?? (!timer.IsRepeat ? DateTime.UtcNow : (DateTime?)null);
+                        var premiereDate = item.PremiereDate ?? (!timer.IsRepeat ? DateTime.UtcNow : null);
 
                         if (premiereDate.HasValue)
                         {
@@ -2126,12 +2125,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
         private LiveTvProgram GetProgramInfoFromCache(TimerInfo timer)
         {
-            return GetProgramInfoFromCache(timer.ProgramId, timer.ChannelId);
-        }
-
-        private LiveTvProgram GetProgramInfoFromCache(string programId, string channelId)
-        {
-            return GetProgramInfoFromCache(programId);
+            return GetProgramInfoFromCache(timer.ProgramId);
         }
 
         private LiveTvProgram GetProgramInfoFromCache(string channelId, DateTime startDateUtc)
@@ -2277,7 +2271,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                     {
                         // Only update if not currently active - test both new timer and existing in case Id's are different
                         // Id's could be different if the timer was created manually prior to series timer creation
-                        if (!_activeRecordings.TryGetValue(timer.Id, out var activeRecordingInfo) && !_activeRecordings.TryGetValue(existingTimer.Id, out activeRecordingInfo))
+                        if (!_activeRecordings.TryGetValue(timer.Id, out _) && !_activeRecordings.TryGetValue(existingTimer.Id, out _))
                         {
                             UpdateExistingTimerWithNewMetadata(existingTimer, timer);
 
@@ -2298,17 +2292,14 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                                 enabledTimersForSeries.Add(existingTimer);
                             }
 
-                            if (updateTimerSettings)
-                            {
-                                existingTimer.KeepUntil = seriesTimer.KeepUntil;
-                                existingTimer.IsPostPaddingRequired = seriesTimer.IsPostPaddingRequired;
-                                existingTimer.IsPrePaddingRequired = seriesTimer.IsPrePaddingRequired;
-                                existingTimer.PostPaddingSeconds = seriesTimer.PostPaddingSeconds;
-                                existingTimer.PrePaddingSeconds = seriesTimer.PrePaddingSeconds;
-                                existingTimer.Priority = seriesTimer.Priority;
-                            }
-
+                            existingTimer.KeepUntil = seriesTimer.KeepUntil;
+                            existingTimer.IsPostPaddingRequired = seriesTimer.IsPostPaddingRequired;
+                            existingTimer.IsPrePaddingRequired = seriesTimer.IsPrePaddingRequired;
+                            existingTimer.PostPaddingSeconds = seriesTimer.PostPaddingSeconds;
+                            existingTimer.PrePaddingSeconds = seriesTimer.PrePaddingSeconds;
+                            existingTimer.Priority = seriesTimer.Priority;
                             existingTimer.SeriesTimerId = seriesTimer.Id;
+
                             _timerProvider.Update(existingTimer);
                         }
                     }
diff --git a/Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs b/Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs
index a88a1fe849..7fa47e7db1 100644
--- a/Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs
+++ b/Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs
@@ -62,12 +62,12 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             using var durationToken = new CancellationTokenSource(duration);
             using var cancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, durationToken.Token);
 
-            await RecordFromFile(mediaSource, mediaSource.Path, targetFile, duration, onStarted, cancellationTokenSource.Token).ConfigureAwait(false);
+            await RecordFromFile(mediaSource, mediaSource.Path, targetFile, onStarted, cancellationTokenSource.Token).ConfigureAwait(false);
 
             _logger.LogInformation("Recording completed to file {0}", targetFile);
         }
 
-        private async Task RecordFromFile(MediaSourceInfo mediaSource, string inputFile, string targetFile, TimeSpan duration, Action onStarted, CancellationToken cancellationToken)
+        private async Task RecordFromFile(MediaSourceInfo mediaSource, string inputFile, string targetFile, Action onStarted, CancellationToken cancellationToken)
         {
             _targetPath = targetFile;
             Directory.CreateDirectory(Path.GetDirectoryName(targetFile));
@@ -81,7 +81,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 RedirectStandardInput = true,
 
                 FileName = _mediaEncoder.EncoderPath,
-                Arguments = GetCommandLineArgs(mediaSource, inputFile, targetFile, duration),
+                Arguments = GetCommandLineArgs(mediaSource, inputFile, targetFile),
 
                 WindowStyle = ProcessWindowStyle.Hidden,
                 ErrorDialog = false
@@ -103,7 +103,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 StartInfo = processStartInfo,
                 EnableRaisingEvents = true
             };
-            _process.Exited += (sender, args) => OnFfMpegProcessExited(_process);
+            _process.Exited += (_, _) => OnFfMpegProcessExited(_process);
 
             _process.Start();
 
@@ -117,7 +117,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             _logger.LogInformation("ffmpeg recording process started for {0}", _targetPath);
         }
 
-        private string GetCommandLineArgs(MediaSourceInfo mediaSource, string inputTempFile, string targetFile, TimeSpan duration)
+        private string GetCommandLineArgs(MediaSourceInfo mediaSource, string inputTempFile, string targetFile)
         {
             string videoArgs;
             if (EncodeVideo(mediaSource))
diff --git a/Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs b/Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs
index dd0cb6c5de..2fbd47bc77 100644
--- a/Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs
+++ b/Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs
@@ -159,8 +159,8 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                         var programEntry = programDict[schedule.ProgramId];
 
                         var allImages = images[imageIndex].Data;
-                        var imagesWithText = allImages.Where(i => string.Equals(i.Text, "yes", StringComparison.OrdinalIgnoreCase));
-                        var imagesWithoutText = allImages.Where(i => string.Equals(i.Text, "no", StringComparison.OrdinalIgnoreCase));
+                        var imagesWithText = allImages.Where(i => string.Equals(i.Text, "yes", StringComparison.OrdinalIgnoreCase)).ToList();
+                        var imagesWithoutText = allImages.Where(i => string.Equals(i.Text, "no", StringComparison.OrdinalIgnoreCase)).ToList();
 
                         const double DesiredAspect = 2.0 / 3;
 
@@ -820,10 +820,5 @@ namespace Emby.Server.Implementations.LiveTv.Listings
 
             return list;
         }
-
-        private static string NormalizeName(string value)
-        {
-            return value.Replace(" ", string.Empty, StringComparison.Ordinal).Replace("-", string.Empty, StringComparison.Ordinal);
-        }
     }
 }
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs
index 78ea7bd0f5..532790019e 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs
@@ -630,7 +630,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
             }
             catch (HttpRequestException ex)
             {
-                if (ex.StatusCode.HasValue && ex.StatusCode.Value == System.Net.HttpStatusCode.NotFound)
+                if (ex.StatusCode.HasValue && ex.StatusCode.Value == HttpStatusCode.NotFound)
                 {
                     // HDHR4 doesn't have this api
                     return;
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunManager.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunManager.cs
index 9ab4cc628b..f009c77cf3 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunManager.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunManager.cs
@@ -122,7 +122,6 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
                         if (!TryGetReturnValueOfGetSet(buffer.AsSpan(0, receivedBytes), out _))
                         {
                             await ReleaseLockkey(_tcpClient, lockKeyValue).ConfigureAwait(false);
-                            continue;
                         }
                     }
 
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
index 99486f25ca..dd83f9a533 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
@@ -131,7 +131,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
         public async Task Validate(TunerHostInfo info)
         {
-            using (var stream = await new M3uParser(Logger, _httpClientFactory).GetListingsStream(info, CancellationToken.None).ConfigureAwait(false))
+            using (await new M3uParser(Logger, _httpClientFactory).GetListingsStream(info, CancellationToken.None).ConfigureAwait(false))
             {
             }
         }
diff --git a/Emby.Server.Implementations/Net/SocketFactory.cs b/Emby.Server.Implementations/Net/SocketFactory.cs
index 6d0c8731e9..fd3fc31c92 100644
--- a/Emby.Server.Implementations/Net/SocketFactory.cs
+++ b/Emby.Server.Implementations/Net/SocketFactory.cs
@@ -19,7 +19,7 @@ namespace Emby.Server.Implementations.Net
                 throw new ArgumentException("localPort cannot be less than zero.", nameof(localPort));
             }
 
-            var retVal = new Socket(AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Dgram, System.Net.Sockets.ProtocolType.Udp);
+            var retVal = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
             try
             {
                 retVal.EnableBroadcast = true;
@@ -44,7 +44,7 @@ namespace Emby.Server.Implementations.Net
                 throw new ArgumentException("localPort cannot be less than zero.", nameof(localPort));
             }
 
-            var retVal = new Socket(AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Dgram, System.Net.Sockets.ProtocolType.Udp);
+            var retVal = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
             try
             {
                 retVal.EnableBroadcast = true;
@@ -85,7 +85,7 @@ namespace Emby.Server.Implementations.Net
                 throw new ArgumentException("localPort cannot be less than zero.", nameof(localPort));
             }
 
-            var retVal = new Socket(AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Dgram, System.Net.Sockets.ProtocolType.Udp);
+            var retVal = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
 
             try
             {
diff --git a/Emby.Server.Implementations/Plugins/PluginManager.cs b/Emby.Server.Implementations/Plugins/PluginManager.cs
index d70a15dbc1..a805924ddf 100644
--- a/Emby.Server.Implementations/Plugins/PluginManager.cs
+++ b/Emby.Server.Implementations/Plugins/PluginManager.cs
@@ -360,11 +360,6 @@ namespace Emby.Server.Implementations.Plugins
         /// <inheritdoc/>
         public async Task<bool> GenerateManifest(PackageInfo packageInfo, Version version, string path, PluginStatus status)
         {
-            if (packageInfo == null)
-            {
-                return false;
-            }
-
             var versionInfo = packageInfo.Versions.First(v => v.Version == version.ToString());
             var imagePath = string.Empty;
 
@@ -617,7 +612,7 @@ namespace Emby.Server.Implementations.Plugins
             if (versionIndex != -1)
             {
                 // Get the version number from the filename if possible.
-                metafile = Path.GetFileName(dir[..versionIndex]) ?? dir[..versionIndex];
+                metafile = Path.GetFileName(dir[..versionIndex]);
                 version = Version.TryParse(dir.AsSpan()[(versionIndex + 1)..], out Version? parsedVersion) ? parsedVersion : _appVersion;
             }
             else
@@ -682,7 +677,6 @@ namespace Emby.Server.Implementations.Plugins
                     continue;
                 }
 
-                var manifest = entry.Manifest;
                 var cleaned = false;
                 var path = entry.Path;
                 if (_config.RemoveOldPlugins)
@@ -707,12 +701,6 @@ namespace Emby.Server.Implementations.Plugins
                     }
                     else
                     {
-                        if (manifest == null)
-                        {
-                            _logger.LogWarning("Unable to disable plugin {Path}", entry.Path);
-                            continue;
-                        }
-
                         ChangePluginState(entry, PluginStatus.Deleted);
                     }
                 }
diff --git a/Emby.Server.Implementations/ScheduledTasks/ScheduledTaskWorker.cs b/Emby.Server.Implementations/ScheduledTasks/ScheduledTaskWorker.cs
index 21a7f4f5f2..299f10544b 100644
--- a/Emby.Server.Implementations/ScheduledTasks/ScheduledTaskWorker.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/ScheduledTaskWorker.cs
@@ -9,6 +9,7 @@ using System.Linq;
 using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
+using Emby.Server.Implementations.ScheduledTasks.Triggers;
 using Jellyfin.Data.Events;
 using Jellyfin.Extensions.Json;
 using MediaBrowser.Common.Configuration;
diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
index 8b185419f3..a5786a3d72 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
@@ -17,7 +17,7 @@ using MediaBrowser.Model.Globalization;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Tasks;
 
-namespace Emby.Server.Implementations.ScheduledTasks
+namespace Emby.Server.Implementations.ScheduledTasks.Tasks
 {
     /// <summary>
     /// Class ChapterImagesTask.
diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/PeopleValidationTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/PeopleValidationTask.cs
index 53c692a461..34780111bf 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/PeopleValidationTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/PeopleValidationTask.cs
@@ -8,7 +8,7 @@ using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Globalization;
 using MediaBrowser.Model.Tasks;
 
-namespace Emby.Server.Implementations.ScheduledTasks
+namespace Emby.Server.Implementations.ScheduledTasks.Tasks
 {
     /// <summary>
     /// Class PeopleValidationTask.
diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/PluginUpdateTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/PluginUpdateTask.cs
index 11a5fb79f4..b3973cecb3 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/PluginUpdateTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/PluginUpdateTask.cs
@@ -12,7 +12,7 @@ using MediaBrowser.Model.Globalization;
 using MediaBrowser.Model.Tasks;
 using Microsoft.Extensions.Logging;
 
-namespace Emby.Server.Implementations.ScheduledTasks
+namespace Emby.Server.Implementations.ScheduledTasks.Tasks
 {
     /// <summary>
     /// Plugin Update Task.
diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/RefreshMediaLibraryTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/RefreshMediaLibraryTask.cs
index 2184b3d033..f7b3cfedcc 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/RefreshMediaLibraryTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/RefreshMediaLibraryTask.cs
@@ -9,7 +9,7 @@ using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Globalization;
 using MediaBrowser.Model.Tasks;
 
-namespace Emby.Server.Implementations.ScheduledTasks
+namespace Emby.Server.Implementations.ScheduledTasks.Tasks
 {
     /// <summary>
     /// Class RefreshMediaLibraryTask.
diff --git a/Emby.Server.Implementations/ScheduledTasks/Triggers/DailyTrigger.cs b/Emby.Server.Implementations/ScheduledTasks/Triggers/DailyTrigger.cs
index 29ab6a73dc..dc5eb73911 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Triggers/DailyTrigger.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Triggers/DailyTrigger.cs
@@ -3,7 +3,7 @@ using System.Threading;
 using MediaBrowser.Model.Tasks;
 using Microsoft.Extensions.Logging;
 
-namespace Emby.Server.Implementations.ScheduledTasks
+namespace Emby.Server.Implementations.ScheduledTasks.Triggers
 {
     /// <summary>
     /// Represents a task trigger that fires everyday.
@@ -41,7 +41,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
         /// <param name="logger">The logger.</param>
         /// <param name="taskName">The name of the task.</param>
         /// <param name="isApplicationStartup">if set to <c>true</c> [is application startup].</param>
-        public void Start(TaskResult lastResult, ILogger logger, string taskName, bool isApplicationStartup)
+        public void Start(TaskResult? lastResult, ILogger logger, string taskName, bool isApplicationStartup)
         {
             DisposeTimer();
 
@@ -54,7 +54,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
 
             logger.LogInformation("Daily trigger for {Task} set to fire at {TriggerDate:yyyy-MM-dd HH:mm:ss.fff zzz}, which is {DueTime:c} from now.", taskName, triggerDate, dueTime);
 
-            _timer = new Timer(state => OnTriggered(), null, dueTime, TimeSpan.FromMilliseconds(-1));
+            _timer = new Timer(_ => OnTriggered(), null, dueTime, TimeSpan.FromMilliseconds(-1));
         }
 
         /// <summary>
diff --git a/Emby.Server.Implementations/ScheduledTasks/Triggers/IntervalTrigger.cs b/Emby.Server.Implementations/ScheduledTasks/Triggers/IntervalTrigger.cs
index 30568e8092..927f57e95a 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Triggers/IntervalTrigger.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Triggers/IntervalTrigger.cs
@@ -4,7 +4,7 @@ using System.Threading;
 using MediaBrowser.Model.Tasks;
 using Microsoft.Extensions.Logging;
 
-namespace Emby.Server.Implementations.ScheduledTasks
+namespace Emby.Server.Implementations.ScheduledTasks.Triggers
 {
     /// <summary>
     /// Represents a task trigger that runs repeatedly on an interval.
@@ -43,7 +43,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
         /// <param name="logger">The logger.</param>
         /// <param name="taskName">The name of the task.</param>
         /// <param name="isApplicationStartup">if set to <c>true</c> [is application startup].</param>
-        public void Start(TaskResult lastResult, ILogger logger, string taskName, bool isApplicationStartup)
+        public void Start(TaskResult? lastResult, ILogger logger, string taskName, bool isApplicationStartup)
         {
             DisposeTimer();
 
@@ -72,7 +72,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
                 dueTime = maxDueTime;
             }
 
-            _timer = new Timer(state => OnTriggered(), null, dueTime, TimeSpan.FromMilliseconds(-1));
+            _timer = new Timer(_ => OnTriggered(), null, dueTime, TimeSpan.FromMilliseconds(-1));
         }
 
         /// <summary>
diff --git a/Emby.Server.Implementations/ScheduledTasks/Triggers/StartupTrigger.cs b/Emby.Server.Implementations/ScheduledTasks/Triggers/StartupTrigger.cs
index 18b9a8b75a..b16693c078 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Triggers/StartupTrigger.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Triggers/StartupTrigger.cs
@@ -5,7 +5,7 @@ using System.Threading.Tasks;
 using MediaBrowser.Model.Tasks;
 using Microsoft.Extensions.Logging;
 
-namespace Emby.Server.Implementations.ScheduledTasks
+namespace Emby.Server.Implementations.ScheduledTasks.Triggers
 {
     /// <summary>
     /// Class StartupTaskTrigger.
@@ -40,7 +40,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
         /// <param name="logger">The logger.</param>
         /// <param name="taskName">The name of the task.</param>
         /// <param name="isApplicationStartup">if set to <c>true</c> [is application startup].</param>
-        public async void Start(TaskResult lastResult, ILogger logger, string taskName, bool isApplicationStartup)
+        public async void Start(TaskResult? lastResult, ILogger logger, string taskName, bool isApplicationStartup)
         {
             if (isApplicationStartup)
             {
diff --git a/Emby.Server.Implementations/ScheduledTasks/Triggers/WeeklyTrigger.cs b/Emby.Server.Implementations/ScheduledTasks/Triggers/WeeklyTrigger.cs
index 36ae190b05..2392b20fd0 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Triggers/WeeklyTrigger.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Triggers/WeeklyTrigger.cs
@@ -3,7 +3,7 @@ using System.Threading;
 using MediaBrowser.Model.Tasks;
 using Microsoft.Extensions.Logging;
 
-namespace Emby.Server.Implementations.ScheduledTasks
+namespace Emby.Server.Implementations.ScheduledTasks.Triggers
 {
     /// <summary>
     /// Represents a task trigger that fires on a weekly basis.
@@ -44,13 +44,13 @@ namespace Emby.Server.Implementations.ScheduledTasks
         /// <param name="logger">The logger.</param>
         /// <param name="taskName">The name of the task.</param>
         /// <param name="isApplicationStartup">if set to <c>true</c> [is application startup].</param>
-        public void Start(TaskResult lastResult, ILogger logger, string taskName, bool isApplicationStartup)
+        public void Start(TaskResult? lastResult, ILogger logger, string taskName, bool isApplicationStartup)
         {
             DisposeTimer();
 
             var triggerDate = GetNextTriggerDateTime();
 
-            _timer = new Timer(state => OnTriggered(), null, triggerDate - DateTime.Now, TimeSpan.FromMilliseconds(-1));
+            _timer = new Timer(_ => OnTriggered(), null, triggerDate - DateTime.Now, TimeSpan.FromMilliseconds(-1));
         }
 
         /// <summary>
diff --git a/Emby.Server.Implementations/Sorting/AlbumComparer.cs b/Emby.Server.Implementations/Sorting/AlbumComparer.cs
index 4d09dda842..4bed0fca12 100644
--- a/Emby.Server.Implementations/Sorting/AlbumComparer.cs
+++ b/Emby.Server.Implementations/Sorting/AlbumComparer.cs
@@ -33,7 +33,7 @@ namespace Emby.Server.Implementations.Sorting
         /// </summary>
         /// <param name="x">The x.</param>
         /// <returns>System.String.</returns>
-        private static string? GetValue(BaseItem? x)
+        private static string GetValue(BaseItem? x)
         {
             return x is Audio audio ? audio.Album : string.Empty;
         }
diff --git a/Emby.Server.Implementations/SyncPlay/SyncPlayManager.cs b/Emby.Server.Implementations/SyncPlay/SyncPlayManager.cs
index 2ebeea7176..53e3b3577f 100644
--- a/Emby.Server.Implementations/SyncPlay/SyncPlayManager.cs
+++ b/Emby.Server.Implementations/SyncPlay/SyncPlayManager.cs
@@ -250,7 +250,6 @@ namespace Emby.Server.Implementations.SyncPlay
 
                     var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
                     _sessionManager.SendSyncPlayGroupUpdate(session.Id, error, CancellationToken.None);
-                    return;
                 }
             }
         }
@@ -365,7 +364,7 @@ namespace Emby.Server.Implementations.SyncPlay
         {
             var session = e.SessionInfo;
 
-            if (_sessionToGroupMap.TryGetValue(session.Id, out var group))
+            if (_sessionToGroupMap.TryGetValue(session.Id, out _))
             {
                 var leaveGroupRequest = new LeaveGroupRequest();
                 LeaveGroup(session, leaveGroupRequest, CancellationToken.None);
@@ -378,7 +377,7 @@ namespace Emby.Server.Implementations.SyncPlay
             var newSessionsCounter = _activeUsers.AddOrUpdate(
                 userId,
                 1,
-                (key, sessionsCounter) => sessionsCounter + toAdd);
+                (_, sessionsCounter) => sessionsCounter + toAdd);
 
             // Should never happen.
             if (newSessionsCounter < 0)
diff --git a/MediaBrowser.Model/Tasks/ITaskTrigger.cs b/MediaBrowser.Model/Tasks/ITaskTrigger.cs
index 999db9605d..8c3ec6626c 100644
--- a/MediaBrowser.Model/Tasks/ITaskTrigger.cs
+++ b/MediaBrowser.Model/Tasks/ITaskTrigger.cs
@@ -25,7 +25,7 @@ namespace MediaBrowser.Model.Tasks
         /// <param name="logger">The <see cref="ILogger"/>.</param>
         /// <param name="taskName">The name of the task.</param>
         /// <param name="isApplicationStartup">Wheter or not this is is fired during startup.</param>
-        void Start(TaskResult lastResult, ILogger logger, string taskName, bool isApplicationStartup);
+        void Start(TaskResult? lastResult, ILogger logger, string taskName, bool isApplicationStartup);
 
         /// <summary>
         /// Stops waiting for the trigger action.