Merge pull request #8511 from Bond-009/isnull

12 files changed, 62 insertions, 62 deletions

diff --git a/MediaBrowser.Model/Dlna/AudioOptions.cs b/MediaBrowser.Model/Dlna/AudioOptions.cs
index 33755e7462..df4018fdd5 100644
--- a/MediaBrowser.Model/Dlna/AudioOptions.cs
+++ b/MediaBrowser.Model/Dlna/AudioOptions.cs
@@ -77,7 +77,7 @@ namespace MediaBrowser.Model.Dlna
                 return MaxBitrate;
             }
 
-            if (Profile == null)
+            if (Profile is null)
             {
                 return null;
             }
diff --git a/MediaBrowser.Model/Dlna/ContainerProfile.cs b/MediaBrowser.Model/Dlna/ContainerProfile.cs
index c6befdd857..927df8e4ef 100644
--- a/MediaBrowser.Model/Dlna/ContainerProfile.cs
+++ b/MediaBrowser.Model/Dlna/ContainerProfile.cs
@@ -36,7 +36,7 @@ namespace MediaBrowser.Model.Dlna
         public static bool ContainsContainer(string? profileContainers, string? inputContainer)
         {
             var isNegativeList = false;
-            if (profileContainers != null && profileContainers.StartsWith('-'))
+            if (profileContainers is not null && profileContainers.StartsWith('-'))
             {
                 isNegativeList = true;
                 profileContainers = profileContainers.Substring(1);
@@ -52,7 +52,7 @@ namespace MediaBrowser.Model.Dlna
 
         public static bool ContainsContainer(string[]? profileContainers, bool isNegativeList, string? inputContainer)
         {
-            if (profileContainers == null || profileContainers.Length == 0)
+            if (profileContainers is null || profileContainers.Length == 0)
             {
                 // Empty profiles always support all containers/codecs
                 return true;
diff --git a/MediaBrowser.Model/Dlna/ContentFeatureBuilder.cs b/MediaBrowser.Model/Dlna/ContentFeatureBuilder.cs
index 1a95763610..1d5d0b1de3 100644
--- a/MediaBrowser.Model/Dlna/ContentFeatureBuilder.cs
+++ b/MediaBrowser.Model/Dlna/ContentFeatureBuilder.cs
@@ -192,7 +192,7 @@ namespace MediaBrowser.Model.Dlna
 
             var orgPnValues = new List<string>();
 
-            if (mediaProfile != null && !string.IsNullOrEmpty(mediaProfile.OrgPn))
+            if (mediaProfile is not null && !string.IsNullOrEmpty(mediaProfile.OrgPn))
             {
                 orgPnValues.AddRange(mediaProfile.OrgPn.Split(',', StringSplitOptions.RemoveEmptyEntries));
             }
diff --git a/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs b/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
index 94071b4196..ce422a2288 100644
--- a/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
+++ b/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
@@ -39,7 +39,7 @@ namespace MediaBrowser.Model.Dlna
             }
 
             var resolutionConfig = GetResolutionConfiguration(outputBitrate);
-            if (resolutionConfig != null)
+            if (resolutionConfig is not null)
             {
                 var originvalValue = maxWidth;
 
diff --git a/MediaBrowser.Model/Dlna/StreamBuilder.cs b/MediaBrowser.Model/Dlna/StreamBuilder.cs
index 6e9b943f74..a004edc6a8 100644
--- a/MediaBrowser.Model/Dlna/StreamBuilder.cs
+++ b/MediaBrowser.Model/Dlna/StreamBuilder.cs
@@ -53,7 +53,7 @@ namespace MediaBrowser.Model.Dlna
             foreach (MediaSourceInfo i in mediaSources)
             {
                 StreamInfo streamInfo = BuildAudioItem(i, options);
-                if (streamInfo != null)
+                if (streamInfo is not null)
                 {
                     streams.Add(streamInfo);
                 }
@@ -86,7 +86,7 @@ namespace MediaBrowser.Model.Dlna
             foreach (MediaSourceInfo i in mediaSources)
             {
                 var streamInfo = BuildVideoItem(i, options);
-                if (streamInfo != null)
+                if (streamInfo is not null)
                 {
                     streams.Add(streamInfo);
                 }
@@ -245,9 +245,9 @@ namespace MediaBrowser.Model.Dlna
 
             var formats = ContainerProfile.SplitValue(inputContainer);
 
-            if (profile != null)
+            if (profile is not null)
             {
-                var playProfiles = playProfile == null ? profile.DirectPlayProfiles : new[] { playProfile };
+                var playProfiles = playProfile is null ? profile.DirectPlayProfiles : new[] { playProfile };
                 foreach (var format in formats)
                 {
                     foreach (var directPlayProfile in playProfiles)
@@ -330,7 +330,7 @@ namespace MediaBrowser.Model.Dlna
                 }
             }
 
-            if (transcodingProfile != null)
+            if (transcodingProfile is not null)
             {
                 if (!item.SupportsTranscoding)
                 {
@@ -370,7 +370,7 @@ namespace MediaBrowser.Model.Dlna
             var directPlayProfile = options.Profile.DirectPlayProfiles
                 .FirstOrDefault(x => x.Type == DlnaProfileType.Audio && IsAudioDirectPlaySupported(x, item, audioStream));
 
-            if (directPlayProfile == null)
+            if (directPlayProfile is null)
             {
                 _logger.LogDebug(
                     "Profile: {0}, No audio direct play profiles found for {1} with codec {2}",
@@ -422,7 +422,7 @@ namespace MediaBrowser.Model.Dlna
 
         private static TranscodeReason GetTranscodeReasonsFromDirectPlayProfile(MediaSourceInfo item, MediaStream videoStream, MediaStream audioStream, IEnumerable<DirectPlayProfile> directPlayProfiles)
         {
-            var mediaType = videoStream == null ? DlnaProfileType.Audio : DlnaProfileType.Video;
+            var mediaType = videoStream is null ? DlnaProfileType.Audio : DlnaProfileType.Video;
 
             var containerSupported = false;
             var audioSupported = false;
@@ -436,9 +436,9 @@ namespace MediaBrowser.Model.Dlna
                 {
                     containerSupported = true;
 
-                    videoSupported = videoStream == null || profile.SupportsVideoCodec(videoStream.Codec);
+                    videoSupported = videoStream is null || profile.SupportsVideoCodec(videoStream.Codec);
 
-                    audioSupported = audioStream == null || profile.SupportsAudioCodec(audioStream.Codec);
+                    audioSupported = audioStream is null || profile.SupportsAudioCodec(audioStream.Codec);
 
                     if (videoSupported && audioSupported)
                     {
@@ -580,13 +580,13 @@ namespace MediaBrowser.Model.Dlna
             var subtitleStream = playlistItem.SubtitleStreamIndex.HasValue ? item.GetMediaStream(MediaStreamType.Subtitle, playlistItem.SubtitleStreamIndex.Value) : null;
 
             var audioStream = item.GetDefaultAudioStream(options.AudioStreamIndex ?? item.DefaultAudioStreamIndex);
-            if (audioStream != null)
+            if (audioStream is not null)
             {
                 playlistItem.AudioStreamIndex = audioStream.Index;
             }
 
             // Collect candidate audio streams
-            ICollection<MediaStream> candidateAudioStreams = audioStream == null ? Array.Empty<MediaStream>() : new[] { audioStream };
+            ICollection<MediaStream> candidateAudioStreams = audioStream is null ? Array.Empty<MediaStream>() : new[] { audioStream };
             if (!options.AudioStreamIndex.HasValue || options.AudioStreamIndex < 0)
             {
                 if (audioStream?.IsDefault == true)
@@ -643,7 +643,7 @@ namespace MediaBrowser.Model.Dlna
                     else if (directPlay == PlayMethod.DirectStream)
                     {
                         playlistItem.AudioStreamIndex = audioStream?.Index;
-                        if (audioStream != null)
+                        if (audioStream is not null)
                         {
                             playlistItem.AudioCodecs = ContainerProfile.SplitValue(directPlayProfile.AudioCodec);
                         }
@@ -652,7 +652,7 @@ namespace MediaBrowser.Model.Dlna
                         BuildStreamVideoItem(playlistItem, options, item, videoStream, audioStream, candidateAudioStreams, directPlayProfile.Container, directPlayProfile.VideoCodec, directPlayProfile.AudioCodec);
                     }
 
-                    if (subtitleStream != null)
+                    if (subtitleStream is not null)
                     {
                         var subtitleProfile = GetSubtitleProfile(item, subtitleStream, options.Profile.SubtitleProfiles, directPlay.Value, _transcoderSupport, directPlayProfile.Container, null);
 
@@ -678,7 +678,7 @@ namespace MediaBrowser.Model.Dlna
                 // Can't direct play, find the transcoding profile
                 // If we do this for direct-stream we will overwrite the info
                 var transcodingProfile = GetVideoTranscodeProfile(item, options, videoStream, audioStream, candidateAudioStreams, subtitleStream, playlistItem);
-                if (transcodingProfile != null)
+                if (transcodingProfile is not null)
                 {
                     SetStreamInfoOptionsFromTranscodingProfile(item, playlistItem, transcodingProfile);
 
@@ -686,7 +686,7 @@ namespace MediaBrowser.Model.Dlna
 
                     playlistItem.PlayMethod = PlayMethod.Transcode;
 
-                    if (subtitleStream != null)
+                    if (subtitleStream is not null)
                     {
                         var subtitleProfile = GetSubtitleProfile(item, subtitleStream, options.Profile.SubtitleProfiles, PlayMethod.Transcode, _transcoderSupport, transcodingProfile.Container, transcodingProfile.Protocol);
 
@@ -729,8 +729,8 @@ namespace MediaBrowser.Model.Dlna
             if (options.AllowVideoStreamCopy)
             {
                 // prefer direct copy profile
-                float videoFramerate = videoStream == null ? 0 : videoStream.AverageFrameRate ?? videoStream.AverageFrameRate ?? 0;
-                TransportStreamTimestamp? timestamp = videoStream == null ? TransportStreamTimestamp.None : item.Timestamp;
+                float videoFramerate = videoStream is null ? 0 : videoStream.AverageFrameRate ?? videoStream.AverageFrameRate ?? 0;
+                TransportStreamTimestamp? timestamp = videoStream is null ? TransportStreamTimestamp.None : item.Timestamp;
                 int? numAudioStreams = item.GetStreamCount(MediaStreamType.Audio);
                 int? numVideoStreams = item.GetStreamCount(MediaStreamType.Video);
 
@@ -768,7 +768,7 @@ namespace MediaBrowser.Model.Dlna
             // Prefer matching video codecs
             var videoCodecs = ContainerProfile.SplitValue(videoCodec);
             var directVideoCodec = ContainerProfile.ContainsContainer(videoCodecs, videoStream?.Codec) ? videoStream?.Codec : null;
-            if (directVideoCodec != null)
+            if (directVideoCodec is not null)
             {
                 // merge directVideoCodec to videoCodecs
                 Array.Resize(ref videoCodecs, videoCodecs.Length + 1);
@@ -780,12 +780,12 @@ namespace MediaBrowser.Model.Dlna
             // Copy video codec options as a starting point, this applies to transcode and direct-stream
             playlistItem.MaxFramerate = videoStream?.AverageFrameRate;
             var qualifier = videoStream?.Codec;
-            if (videoStream?.Level != null)
+            if (videoStream?.Level is not null)
             {
                 playlistItem.SetOption(qualifier, "level", videoStream.Level.Value.ToString(CultureInfo.InvariantCulture));
             }
 
-            if (videoStream?.BitDepth != null)
+            if (videoStream?.BitDepth is not null)
             {
                 playlistItem.SetOption(qualifier, "videobitdepth", videoStream.BitDepth.Value.ToString(CultureInfo.InvariantCulture));
             }
@@ -795,7 +795,7 @@ namespace MediaBrowser.Model.Dlna
                 playlistItem.SetOption(qualifier, "profile", videoStream.Profile.ToLowerInvariant());
             }
 
-            if (videoStream != null && videoStream.Level != 0)
+            if (videoStream is not null && videoStream.Level != 0)
             {
                 playlistItem.SetOption(qualifier, "level", videoStream.Level.ToString());
             }
@@ -804,7 +804,7 @@ namespace MediaBrowser.Model.Dlna
             var audioCodecs = ContainerProfile.SplitValue(audioCodec);
             var directAudioStream = candidateAudioStreams.FirstOrDefault(stream => ContainerProfile.ContainsContainer(audioCodecs, stream.Codec));
             playlistItem.AudioCodecs = audioCodecs;
-            if (directAudioStream != null)
+            if (directAudioStream is not null)
             {
                 audioStream = directAudioStream;
                 playlistItem.AudioStreamIndex = audioStream.Index;
@@ -832,13 +832,13 @@ namespace MediaBrowser.Model.Dlna
             double? videoLevel = videoStream?.Level;
             string videoProfile = videoStream?.Profile;
             string videoRangeType = videoStream?.VideoRangeType;
-            float videoFramerate = videoStream == null ? 0 : videoStream.AverageFrameRate ?? videoStream.AverageFrameRate ?? 0;
+            float videoFramerate = videoStream is null ? 0 : videoStream.AverageFrameRate ?? videoStream.AverageFrameRate ?? 0;
             bool? isAnamorphic = videoStream?.IsAnamorphic;
             bool? isInterlaced = videoStream?.IsInterlaced;
             string videoCodecTag = videoStream?.CodecTag;
             bool? isAvc = videoStream?.IsAVC;
 
-            TransportStreamTimestamp? timestamp = videoStream == null ? TransportStreamTimestamp.None : item.Timestamp;
+            TransportStreamTimestamp? timestamp = videoStream is null ? TransportStreamTimestamp.None : item.Timestamp;
             int? packetLength = videoStream?.PacketLength;
             int? refFrames = videoStream?.RefFrames;
 
@@ -870,12 +870,12 @@ namespace MediaBrowser.Model.Dlna
             int audioBitrate = GetAudioBitrate(options.GetMaxBitrate(false) ?? 0, playlistItem.TargetAudioCodec, audioStream, playlistItem);
             playlistItem.AudioBitrate = Math.Min(playlistItem.AudioBitrate ?? audioBitrate, audioBitrate);
 
-            bool? isSecondaryAudio = audioStream == null ? null : item.IsSecondaryAudio(audioStream);
-            int? inputAudioBitrate = audioStream == null ? null : audioStream.BitRate;
-            int? audioChannels = audioStream == null ? null : audioStream.Channels;
-            string audioProfile = audioStream == null ? null : audioStream.Profile;
-            int? inputAudioSampleRate = audioStream == null ? null : audioStream.SampleRate;
-            int? inputAudioBitDepth = audioStream == null ? null : audioStream.BitDepth;
+            bool? isSecondaryAudio = audioStream is null ? null : item.IsSecondaryAudio(audioStream);
+            int? inputAudioBitrate = audioStream is null ? null : audioStream.BitRate;
+            int? audioChannels = audioStream is null ? null : audioStream.Channels;
+            string audioProfile = audioStream is null ? null : audioStream.Profile;
+            int? inputAudioSampleRate = audioStream is null ? null : audioStream.SampleRate;
+            int? inputAudioBitDepth = audioStream is null ? null : audioStream.BitDepth;
 
             var appliedAudioConditions = options.Profile.CodecProfiles
                 .Where(i => i.Type == CodecType.VideoAudio &&
@@ -965,7 +965,7 @@ namespace MediaBrowser.Model.Dlna
             int defaultBitrate;
             int encoderAudioBitrateLimit = int.MaxValue;
 
-            if (audioStream == null)
+            if (audioStream is null)
             {
                 defaultBitrate = 192000;
             }
@@ -982,7 +982,7 @@ namespace MediaBrowser.Model.Dlna
                          && audioStream.Channels.HasValue
                          && audioStream.Channels.Value <= targetAudioChannels.Value
                          && !string.IsNullOrEmpty(audioStream.Codec)
-                         && targetAudioCodecs != null
+                         && targetAudioCodecs is not null
                          && targetAudioCodecs.Length > 0
                          && !Array.Exists(targetAudioCodecs, elem => string.Equals(audioStream.Codec, elem, StringComparison.OrdinalIgnoreCase)))
                 {
@@ -1080,13 +1080,13 @@ namespace MediaBrowser.Model.Dlna
             double? videoLevel = videoStream?.Level;
             string videoProfile = videoStream?.Profile;
             string videoRangeType = videoStream?.VideoRangeType;
-            float videoFramerate = videoStream == null ? 0 : videoStream.AverageFrameRate ?? videoStream.AverageFrameRate ?? 0;
+            float videoFramerate = videoStream is null ? 0 : videoStream.AverageFrameRate ?? videoStream.AverageFrameRate ?? 0;
             bool? isAnamorphic = videoStream?.IsAnamorphic;
             bool? isInterlaced = videoStream?.IsInterlaced;
             string videoCodecTag = videoStream?.CodecTag;
             bool? isAvc = videoStream?.IsAVC;
 
-            TransportStreamTimestamp? timestamp = videoStream == null ? TransportStreamTimestamp.None : mediaSource.Timestamp;
+            TransportStreamTimestamp? timestamp = videoStream is null ? TransportStreamTimestamp.None : mediaSource.Timestamp;
             int? packetLength = videoStream?.PacketLength;
             int? refFrames = videoStream?.RefFrames;
 
@@ -1119,7 +1119,7 @@ namespace MediaBrowser.Model.Dlna
             var audioStreamMatches = candidateAudioStreams.ToDictionary(s => s, audioStream => CheckVideoAudioStreamDirectPlay(options, mediaSource, container, audioStream));
 
             TranscodeReason subtitleProfileReasons = 0;
-            if (subtitleStream != null)
+            if (subtitleStream is not null)
             {
                 var subtitleProfile = GetSubtitleProfile(mediaSource, subtitleStream, options.Profile.SubtitleProfiles, PlayMethod.DirectPlay, _transcoderSupport, container, null);
 
@@ -1177,7 +1177,7 @@ namespace MediaBrowser.Model.Dlna
                     if (candidateAudioStreams.Any())
                     {
                         selectedAudioStream = candidateAudioStreams.FirstOrDefault(audioStream => directPlayProfile.SupportsAudioCodec(audioStream.Codec));
-                        if (selectedAudioStream == null)
+                        if (selectedAudioStream is null)
                         {
                             directPlayProfileReasons |= TranscodeReason.AudioCodecNotSupported;
                         }
@@ -1206,7 +1206,7 @@ namespace MediaBrowser.Model.Dlna
                     {
                         playMethod = PlayMethod.DirectPlay;
                     }
-                    else if (directStreamFailureReasons == 0 && isEligibleForDirectStream && mediaSource.SupportsDirectStream && directPlayProfile != null)
+                    else if (directStreamFailureReasons == 0 && isEligibleForDirectStream && mediaSource.SupportsDirectStream && directPlayProfile is not null)
                     {
                         playMethod = PlayMethod.DirectStream;
                     }
@@ -1218,12 +1218,12 @@ namespace MediaBrowser.Model.Dlna
                 .ThenByDescending(analysis => analysis.Rank)
                 .ThenBy(analysis => analysis.Order)
                 .ToArray()
-                .ToLookup(analysis => analysis.Result.PlayMethod != null);
+                .ToLookup(analysis => analysis.Result.PlayMethod is not null);
 
             var profileMatch = analyzedProfiles[true]
                 .Select(analysis => analysis.Result)
                 .FirstOrDefault();
-            if (profileMatch.Profile != null)
+            if (profileMatch.Profile is not null)
             {
                 return profileMatch;
             }
@@ -1501,12 +1501,12 @@ namespace MediaBrowser.Model.Dlna
                 throw new ArgumentException("DeviceId is required");
             }
 
-            if (options.Profile == null)
+            if (options.Profile is null)
             {
                 throw new ArgumentException("Profile is required");
             }
 
-            if (options.MediaSources == null)
+            if (options.MediaSources is null)
             {
                 throw new ArgumentException("MediaSources is required");
             }
diff --git a/MediaBrowser.Model/Dlna/StreamInfo.cs b/MediaBrowser.Model/Dlna/StreamInfo.cs
index 5cfa2e7e3c..9e0536c733 100644
--- a/MediaBrowser.Model/Dlna/StreamInfo.cs
+++ b/MediaBrowser.Model/Dlna/StreamInfo.cs
@@ -215,7 +215,7 @@ namespace MediaBrowser.Model.Dlna
                 var stream = TargetVideoStream;
                 return MaxFramerate.HasValue && !IsDirectStream
                     ? MaxFramerate
-                    : stream == null ? null : stream.AverageFrameRate ?? stream.RealFrameRate;
+                    : stream is null ? null : stream.AverageFrameRate ?? stream.RealFrameRate;
             }
         }
 
@@ -460,7 +460,7 @@ namespace MediaBrowser.Model.Dlna
 
                 return !IsDirectStream
                     ? defaultValue
-                    : MediaSource == null ? defaultValue : MediaSource.Timestamp ?? TransportStreamTimestamp.None;
+                    : MediaSource is null ? defaultValue : MediaSource.Timestamp ?? TransportStreamTimestamp.None;
             }
         }
 
@@ -521,7 +521,7 @@ namespace MediaBrowser.Model.Dlna
             {
                 var videoStream = TargetVideoStream;
 
-                if (videoStream != null && videoStream.Width.HasValue && videoStream.Height.HasValue)
+                if (videoStream is not null && videoStream.Width.HasValue && videoStream.Height.HasValue)
                 {
                     ImageDimensions size = new ImageDimensions(videoStream.Width.Value, videoStream.Height.Value);
 
@@ -540,7 +540,7 @@ namespace MediaBrowser.Model.Dlna
             {
                 var videoStream = TargetVideoStream;
 
-                if (videoStream != null && videoStream.Width.HasValue && videoStream.Height.HasValue)
+                if (videoStream is not null && videoStream.Width.HasValue && videoStream.Height.HasValue)
                 {
                     ImageDimensions size = new ImageDimensions(videoStream.Width.Value, videoStream.Height.Value);
 
diff --git a/MediaBrowser.Model/Drawing/DrawingUtils.cs b/MediaBrowser.Model/Drawing/DrawingUtils.cs
index 5567927682..2040d26bbb 100644
--- a/MediaBrowser.Model/Drawing/DrawingUtils.cs
+++ b/MediaBrowser.Model/Drawing/DrawingUtils.cs
@@ -71,18 +71,18 @@ namespace MediaBrowser.Model.Drawing
             int? fillHeight)
         {
             // Return original size if input is invalid.
-            if ((fillWidth == null || fillWidth == 0)
-                && (fillHeight == null || fillHeight == 0))
+            if ((fillWidth is null || fillWidth == 0)
+                && (fillHeight is null || fillHeight == 0))
             {
                 return size;
             }
 
-            if (fillWidth == null || fillWidth == 0)
+            if (fillWidth is null || fillWidth == 0)
             {
                 fillWidth = 1;
             }
 
-            if (fillHeight == null || fillHeight == 0)
+            if (fillHeight is null || fillHeight == 0)
             {
                 fillHeight = 1;
             }
diff --git a/MediaBrowser.Model/Dto/BaseItemPerson.cs b/MediaBrowser.Model/Dto/BaseItemPerson.cs
index 6b920b0efb..9c65a2308d 100644
--- a/MediaBrowser.Model/Dto/BaseItemPerson.cs
+++ b/MediaBrowser.Model/Dto/BaseItemPerson.cs
@@ -52,6 +52,6 @@ namespace MediaBrowser.Model.Dto
         /// </summary>
         /// <value><c>true</c> if this instance has primary image; otherwise, <c>false</c>.</value>
         [JsonIgnore]
-        public bool HasPrimaryImage => PrimaryImageTag != null;
+        public bool HasPrimaryImage => PrimaryImageTag is not null;
     }
 }
diff --git a/MediaBrowser.Model/Dto/MediaSourceInfo.cs b/MediaBrowser.Model/Dto/MediaSourceInfo.cs
index c348e83ae5..520832aeee 100644
--- a/MediaBrowser.Model/Dto/MediaSourceInfo.cs
+++ b/MediaBrowser.Model/Dto/MediaSourceInfo.cs
@@ -134,7 +134,7 @@ namespace MediaBrowser.Model.Dto
 
         public void InferTotalBitrate(bool force = false)
         {
-            if (MediaStreams == null)
+            if (MediaStreams is null)
             {
                 return;
             }
diff --git a/MediaBrowser.Model/Entities/ProviderIdsExtensions.cs b/MediaBrowser.Model/Entities/ProviderIdsExtensions.cs
index d3b8400f34..cf453d62cb 100644
--- a/MediaBrowser.Model/Entities/ProviderIdsExtensions.cs
+++ b/MediaBrowser.Model/Entities/ProviderIdsExtensions.cs
@@ -55,7 +55,7 @@ namespace MediaBrowser.Model.Entities
         {
             ArgumentNullException.ThrowIfNull(instance);
 
-            if (instance.ProviderIds == null)
+            if (instance.ProviderIds is null)
             {
                 id = null;
                 return false;
diff --git a/MediaBrowser.Model/Notifications/NotificationOptions.cs b/MediaBrowser.Model/Notifications/NotificationOptions.cs
index d1b5491bd1..804f51e166 100644
--- a/MediaBrowser.Model/Notifications/NotificationOptions.cs
+++ b/MediaBrowser.Model/Notifications/NotificationOptions.cs
@@ -86,14 +86,14 @@ namespace MediaBrowser.Model.Notifications
         {
             NotificationOption opt = GetOptions(type);
 
-            return opt != null && opt.Enabled;
+            return opt is not null && opt.Enabled;
         }
 
         public bool IsServiceEnabled(string service, string notificationType)
         {
             NotificationOption opt = GetOptions(notificationType);
 
-            return opt == null
+            return opt is null
                    || !opt.DisabledServices.Contains(service, StringComparison.OrdinalIgnoreCase);
         }
 
@@ -101,7 +101,7 @@ namespace MediaBrowser.Model.Notifications
         {
             NotificationOption opt = GetOptions(type);
 
-            return opt != null
+            return opt is not null
                    && opt.Enabled
                    && !opt.DisabledMonitorUsers.Contains(userId.ToString("N"), StringComparison.OrdinalIgnoreCase);
         }
@@ -110,7 +110,7 @@ namespace MediaBrowser.Model.Notifications
         {
             NotificationOption opt = GetOptions(type);
 
-            if (opt != null && opt.Enabled)
+            if (opt is not null && opt.Enabled)
             {
                 if (opt.SendToUserMode == SendToUserType.All)
                 {
diff --git a/MediaBrowser.Model/Updates/VersionInfo.cs b/MediaBrowser.Model/Updates/VersionInfo.cs
index 03a540dde2..320199f984 100644
--- a/MediaBrowser.Model/Updates/VersionInfo.cs
+++ b/MediaBrowser.Model/Updates/VersionInfo.cs
@@ -17,7 +17,7 @@ namespace MediaBrowser.Model.Updates
         [JsonPropertyName("version")]
         public string Version
         {
-            get => _version == null ? string.Empty : _version.ToString();
+            get => _version is null ? string.Empty : _version.ToString();
 
             set => _version = SysVersion.Parse(value);
         }