diff --git a/Emby.Dlna/ContentDirectory/ControlHandler.cs b/Emby.Dlna/ContentDirectory/ControlHandler.cs
index 27c5b22680..ac336e5dcc 100644
--- a/Emby.Dlna/ContentDirectory/ControlHandler.cs
+++ b/Emby.Dlna/ContentDirectory/ControlHandler.cs
@@ -288,21 +288,14 @@ namespace Emby.Dlna.ContentDirectory
         /// <returns>The xml feature list.</returns>
         private static string WriteFeatureListXml()
         {
-            // TODO: clean this up
-            var builder = new StringBuilder();
-
-            builder.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
-            builder.Append("<Features xmlns=\"urn:schemas-upnp-org:av:avs\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"urn:schemas-upnp-org:av:avs http://www.upnp.org/schemas/av/avs.xsd\">");
-
-            builder.Append("<Feature name=\"samsung.com_BASICVIEW\" version=\"1\">");
-            builder.Append("<container id=\"I\" type=\"object.item.imageItem\"/>");
-            builder.Append("<container id=\"A\" type=\"object.item.audioItem\"/>");
-            builder.Append("<container id=\"V\" type=\"object.item.videoItem\"/>");
-            builder.Append("</Feature>");
-
-            builder.Append("</Features>");
-
-            return builder.ToString();
+            return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+                + "<Features xmlns=\"urn:schemas-upnp-org:av:avs\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"urn:schemas-upnp-org:av:avs http://www.upnp.org/schemas/av/avs.xsd\">"
+                + "<Feature name=\"samsung.com_BASICVIEW\" version=\"1\">"
+                + "<container id=\"I\" type=\"object.item.imageItem\"/>"
+                + "<container id=\"A\" type=\"object.item.audioItem\"/>"
+                + "<container id=\"V\" type=\"object.item.videoItem\"/>"
+                + "</Feature>"
+                + "</Features>";
         }
 
         /// <summary>
diff --git a/Emby.Naming/AudioBook/AudioBookInfo.cs b/Emby.Naming/AudioBook/AudioBookInfo.cs
index 15702ff2ca..acd8905af6 100644
--- a/Emby.Naming/AudioBook/AudioBookInfo.cs
+++ b/Emby.Naming/AudioBook/AudioBookInfo.cs
@@ -15,7 +15,7 @@ namespace Emby.Naming.AudioBook
         /// <param name="files">List of files composing the actual audiobook.</param>
         /// <param name="extras">List of extra files.</param>
         /// <param name="alternateVersions">Alternative version of files.</param>
-        public AudioBookInfo(string name, int? year, List<AudioBookFileInfo> files, List<AudioBookFileInfo> extras, List<AudioBookFileInfo> alternateVersions)
+        public AudioBookInfo(string name, int? year, IReadOnlyList<AudioBookFileInfo> files, IReadOnlyList<AudioBookFileInfo> extras, IReadOnlyList<AudioBookFileInfo> alternateVersions)
         {
             Name = name;
             Year = year;
@@ -39,18 +39,18 @@ namespace Emby.Naming.AudioBook
         /// Gets or sets the files.
         /// </summary>
         /// <value>The files.</value>
-        public List<AudioBookFileInfo> Files { get; set; }
+        public IReadOnlyList<AudioBookFileInfo> Files { get; set; }
 
         /// <summary>
         /// Gets or sets the extras.
         /// </summary>
         /// <value>The extras.</value>
-        public List<AudioBookFileInfo> Extras { get; set; }
+        public IReadOnlyList<AudioBookFileInfo> Extras { get; set; }
 
         /// <summary>
         /// Gets or sets the alternate versions.
         /// </summary>
         /// <value>The alternate versions.</value>
-        public List<AudioBookFileInfo> AlternateVersions { get; set; }
+        public IReadOnlyList<AudioBookFileInfo> AlternateVersions { get; set; }
     }
 }
diff --git a/Emby.Naming/AudioBook/AudioBookListResolver.cs b/Emby.Naming/AudioBook/AudioBookListResolver.cs
index ca53228903..1e4a8d2edc 100644
--- a/Emby.Naming/AudioBook/AudioBookListResolver.cs
+++ b/Emby.Naming/AudioBook/AudioBookListResolver.cs
@@ -87,7 +87,7 @@ namespace Emby.Naming.AudioBook
                         foreach (var audioFile in group)
                         {
                             var name = Path.GetFileNameWithoutExtension(audioFile.Path);
-                            if (name.Equals("audiobook") ||
+                            if (name.Equals("audiobook", StringComparison.OrdinalIgnoreCase) ||
                                 name.Contains(nameParserResult.Name, StringComparison.OrdinalIgnoreCase) ||
                                 name.Contains(nameWithReplacedDots, StringComparison.OrdinalIgnoreCase))
                             {
diff --git a/Emby.Naming/Emby.Naming.csproj b/Emby.Naming/Emby.Naming.csproj
index db1b8ac9d7..07d879e96a 100644
--- a/Emby.Naming/Emby.Naming.csproj
+++ b/Emby.Naming/Emby.Naming.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <!-- ProjectGuid is only included as a requirement for SonarQube analysis -->
   <PropertyGroup>
@@ -49,7 +49,4 @@
     <PackageReference Include="SmartAnalyzers.MultithreadingAnalyzer" Version="1.1.31" PrivateAssets="All" />
   </ItemGroup>
 
-  <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
-  </PropertyGroup>
-
 </Project>
diff --git a/Emby.Naming/Video/VideoListResolver.cs b/Emby.Naming/Video/VideoListResolver.cs
index 7da2dcd7a5..ed7d511a39 100644
--- a/Emby.Naming/Video/VideoListResolver.cs
+++ b/Emby.Naming/Video/VideoListResolver.cs
@@ -21,7 +21,7 @@ namespace Emby.Naming.Video
         /// <param name="namingOptions">The naming options.</param>
         /// <param name="supportMultiVersion">Indication we should consider multi-versions of content.</param>
         /// <returns>Returns enumerable of <see cref="VideoInfo"/> which groups files together when related.</returns>
-        public static IEnumerable<VideoInfo> Resolve(List<FileSystemMetadata> files, NamingOptions namingOptions, bool supportMultiVersion = true)
+        public static IEnumerable<VideoInfo> Resolve(IEnumerable<FileSystemMetadata> files, NamingOptions namingOptions, bool supportMultiVersion = true)
         {
             var videoInfos = files
                 .Select(i => VideoResolver.Resolve(i.FullName, i.IsDirectory, namingOptions))
diff --git a/Emby.Server.Implementations/HttpServer/Security/AuthorizationContext.cs b/Emby.Server.Implementations/HttpServer/Security/AuthorizationContext.cs
index 488614609a..b2625a68c9 100644
--- a/Emby.Server.Implementations/HttpServer/Security/AuthorizationContext.cs
+++ b/Emby.Server.Implementations/HttpServer/Security/AuthorizationContext.cs
@@ -141,7 +141,7 @@ namespace Emby.Server.Implementations.HttpServer.Security
                 }
 
                 // Temporary. TODO - allow clients to specify that the token has been shared with a casting device
-                var allowTokenInfoUpdate = authInfo.Client == null || authInfo.Client.IndexOf("chromecast", StringComparison.OrdinalIgnoreCase) == -1;
+                var allowTokenInfoUpdate = authInfo.Client == null || !authInfo.Client.Contains("chromecast", StringComparison.OrdinalIgnoreCase);
 
                 if (string.IsNullOrWhiteSpace(authInfo.Device))
                 {
diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
index baeb86a221..b764a139cb 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
@@ -55,9 +55,19 @@ namespace Emby.Server.Implementations.ScheduledTasks
             _localization = localization;
         }
 
-        /// <summary>
-        /// Creates the triggers that define when the task will run.
-        /// </summary>
+        /// <inheritdoc />
+        public string Name => _localization.GetLocalizedString("TaskRefreshChapterImages");
+
+        /// <inheritdoc />
+        public string Description => _localization.GetLocalizedString("TaskRefreshChapterImagesDescription");
+
+        /// <inheritdoc />
+        public string Category => _localization.GetLocalizedString("TasksLibraryCategory");
+
+        /// <inheritdoc />
+        public string Key => "RefreshChapterImages";
+
+        /// <inheritdoc />
         public IEnumerable<TaskTriggerInfo> GetDefaultTriggers()
         {
             return new[]
@@ -162,26 +172,5 @@ namespace Emby.Server.Implementations.ScheduledTasks
                 }
             }
         }
-
-        /// <inheritdoc />
-        public string Name => _localization.GetLocalizedString("TaskRefreshChapterImages");
-
-        /// <inheritdoc />
-        public string Description => _localization.GetLocalizedString("TaskRefreshChapterImagesDescription");
-
-        /// <inheritdoc />
-        public string Category => _localization.GetLocalizedString("TasksLibraryCategory");
-
-        /// <inheritdoc />
-        public string Key => "RefreshChapterImages";
-
-        /// <inheritdoc />
-        public bool IsHidden => false;
-
-        /// <inheritdoc />
-        public bool IsEnabled => true;
-
-        /// <inheritdoc />
-        public bool IsLogged => true;
     }
 }