Replace != null with is not null

4 files changed, 44 insertions, 44 deletions

diff --git a/Emby.Dlna/PlayTo/Device.cs b/Emby.Dlna/PlayTo/Device.cs
index 1c7730187b..fc000334a1 100644
--- a/Emby.Dlna/PlayTo/Device.cs
+++ b/Emby.Dlna/PlayTo/Device.cs
@@ -543,7 +543,7 @@ namespace Emby.Dlna.PlayTo
                             currentObject = await GetMediaInfo(avCommands, cancellationToken).ConfigureAwait(false);
                         }
 
-                        if (currentObject != null)
+                        if (currentObject is not null)
                         {
                             UpdateMediaInfo(currentObject, transportState.Value);
                         }
@@ -585,7 +585,7 @@ namespace Emby.Dlna.PlayTo
                 if (_connectFailureCount >= 3)
                 {
                     var action = OnDeviceUnavailable;
-                    if (action != null)
+                    if (action is not null)
                     {
                         _logger.LogDebug("Disposing device due to loss of connection");
                         action();
@@ -631,7 +631,7 @@ namespace Emby.Dlna.PlayTo
                 return;
             }
 
-            var volume = result.Document.Descendants(UPnpNamespaces.RenderingControl + "GetVolumeResponse").Select(i => i.Element("CurrentVolume")).FirstOrDefault(i => i != null);
+            var volume = result.Document.Descendants(UPnpNamespaces.RenderingControl + "GetVolumeResponse").Select(i => i.Element("CurrentVolume")).FirstOrDefault(i => i is not null);
             var volumeValue = volume?.Value;
 
             if (string.IsNullOrWhiteSpace(volumeValue))
@@ -683,7 +683,7 @@ namespace Emby.Dlna.PlayTo
 
             var valueNode = result.Document.Descendants(UPnpNamespaces.RenderingControl + "GetMuteResponse")
                                             .Select(i => i.Element("CurrentMute"))
-                                            .FirstOrDefault(i => i != null);
+                                            .FirstOrDefault(i => i is not null);
 
             IsMuted = string.Equals(valueNode?.Value, "1", StringComparison.OrdinalIgnoreCase);
         }
@@ -715,11 +715,11 @@ namespace Emby.Dlna.PlayTo
             }
 
             var transportState =
-                result.Document.Descendants(UPnpNamespaces.AvTransport + "GetTransportInfoResponse").Select(i => i.Element("CurrentTransportState")).FirstOrDefault(i => i != null);
+                result.Document.Descendants(UPnpNamespaces.AvTransport + "GetTransportInfoResponse").Select(i => i.Element("CurrentTransportState")).FirstOrDefault(i => i is not null);
 
             var transportStateValue = transportState?.Value;
 
-            if (transportStateValue != null
+            if (transportStateValue is not null
                 && Enum.TryParse(transportStateValue, true, out TransportState state))
             {
                 return state;
@@ -832,10 +832,10 @@ namespace Emby.Dlna.PlayTo
                 return (false, null);
             }
 
-            var trackUriElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("TrackURI")).FirstOrDefault(i => i != null);
+            var trackUriElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("TrackURI")).FirstOrDefault(i => i is not null);
             var trackUri = trackUriElem?.Value;
 
-            var durationElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("TrackDuration")).FirstOrDefault(i => i != null);
+            var durationElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("TrackDuration")).FirstOrDefault(i => i is not null);
             var duration = durationElem?.Value;
 
             if (!string.IsNullOrWhiteSpace(duration)
@@ -848,7 +848,7 @@ namespace Emby.Dlna.PlayTo
                 Duration = null;
             }
 
-            var positionElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("RelTime")).FirstOrDefault(i => i != null);
+            var positionElem = result.Document.Descendants(UPnpNamespaces.AvTransport + "GetPositionInfoResponse").Select(i => i.Element("RelTime")).FirstOrDefault(i => i is not null);
             var position = positionElem?.Value;
 
             if (!string.IsNullOrWhiteSpace(position) && !string.Equals(position, "NOT_IMPLEMENTED", StringComparison.OrdinalIgnoreCase))
@@ -959,11 +959,11 @@ namespace Emby.Dlna.PlayTo
 
             var resElement = container.Element(UPnpNamespaces.Res);
 
-            if (resElement != null)
+            if (resElement is not null)
             {
                 var info = resElement.Attribute(UPnpNamespaces.ProtocolInfo);
 
-                if (info != null && !string.IsNullOrWhiteSpace(info.Value))
+                if (info is not null && !string.IsNullOrWhiteSpace(info.Value))
                 {
                     return info.Value.Split(':');
                 }
@@ -974,7 +974,7 @@ namespace Emby.Dlna.PlayTo
 
         private async Task<TransportCommands> GetAVProtocolAsync(CancellationToken cancellationToken)
         {
-            if (AvCommands != null)
+            if (AvCommands is not null)
             {
                 return AvCommands;
             }
@@ -1006,7 +1006,7 @@ namespace Emby.Dlna.PlayTo
 
         private async Task<TransportCommands> GetRenderingProtocolAsync(CancellationToken cancellationToken)
         {
-            if (RendererCommands != null)
+            if (RendererCommands is not null)
             {
                 return RendererCommands;
             }
@@ -1070,13 +1070,13 @@ namespace Emby.Dlna.PlayTo
             var friendlyNames = new List<string>();
 
             var name = document.Descendants(UPnpNamespaces.Ud.GetName("friendlyName")).FirstOrDefault();
-            if (name != null && !string.IsNullOrWhiteSpace(name.Value))
+            if (name is not null && !string.IsNullOrWhiteSpace(name.Value))
             {
                 friendlyNames.Add(name.Value);
             }
 
             var room = document.Descendants(UPnpNamespaces.Ud.GetName("roomName")).FirstOrDefault();
-            if (room != null && !string.IsNullOrWhiteSpace(room.Value))
+            if (room is not null && !string.IsNullOrWhiteSpace(room.Value))
             {
                 friendlyNames.Add(room.Value);
             }
@@ -1088,61 +1088,61 @@ namespace Emby.Dlna.PlayTo
             };
 
             var model = document.Descendants(UPnpNamespaces.Ud.GetName("modelName")).FirstOrDefault();
-            if (model != null)
+            if (model is not null)
             {
                 deviceProperties.ModelName = model.Value;
             }
 
             var modelNumber = document.Descendants(UPnpNamespaces.Ud.GetName("modelNumber")).FirstOrDefault();
-            if (modelNumber != null)
+            if (modelNumber is not null)
             {
                 deviceProperties.ModelNumber = modelNumber.Value;
             }
 
             var uuid = document.Descendants(UPnpNamespaces.Ud.GetName("UDN")).FirstOrDefault();
-            if (uuid != null)
+            if (uuid is not null)
             {
                 deviceProperties.UUID = uuid.Value;
             }
 
             var manufacturer = document.Descendants(UPnpNamespaces.Ud.GetName("manufacturer")).FirstOrDefault();
-            if (manufacturer != null)
+            if (manufacturer is not null)
             {
                 deviceProperties.Manufacturer = manufacturer.Value;
             }
 
             var manufacturerUrl = document.Descendants(UPnpNamespaces.Ud.GetName("manufacturerURL")).FirstOrDefault();
-            if (manufacturerUrl != null)
+            if (manufacturerUrl is not null)
             {
                 deviceProperties.ManufacturerUrl = manufacturerUrl.Value;
             }
 
             var presentationUrl = document.Descendants(UPnpNamespaces.Ud.GetName("presentationURL")).FirstOrDefault();
-            if (presentationUrl != null)
+            if (presentationUrl is not null)
             {
                 deviceProperties.PresentationUrl = presentationUrl.Value;
             }
 
             var modelUrl = document.Descendants(UPnpNamespaces.Ud.GetName("modelURL")).FirstOrDefault();
-            if (modelUrl != null)
+            if (modelUrl is not null)
             {
                 deviceProperties.ModelUrl = modelUrl.Value;
             }
 
             var serialNumber = document.Descendants(UPnpNamespaces.Ud.GetName("serialNumber")).FirstOrDefault();
-            if (serialNumber != null)
+            if (serialNumber is not null)
             {
                 deviceProperties.SerialNumber = serialNumber.Value;
             }
 
             var modelDescription = document.Descendants(UPnpNamespaces.Ud.GetName("modelDescription")).FirstOrDefault();
-            if (modelDescription != null)
+            if (modelDescription is not null)
             {
                 deviceProperties.ModelDescription = modelDescription.Value;
             }
 
             var icon = document.Descendants(UPnpNamespaces.Ud.GetName("icon")).FirstOrDefault();
-            if (icon != null)
+            if (icon is not null)
             {
                 deviceProperties.Icon = CreateIcon(icon);
             }
@@ -1164,7 +1164,7 @@ namespace Emby.Dlna.PlayTo
                 {
                     var service = Create(element);
 
-                    if (service != null)
+                    if (service is not null)
                     {
                         deviceProperties.Services.Add(service);
                     }
@@ -1214,7 +1214,7 @@ namespace Emby.Dlna.PlayTo
 
             if (mediaInfo is null)
             {
-                if (previousMediaInfo != null)
+                if (previousMediaInfo is not null)
                 {
                     OnPlaybackStop(previousMediaInfo);
                 }
diff --git a/Emby.Dlna/PlayTo/PlayToController.cs b/Emby.Dlna/PlayTo/PlayToController.cs
index fca5fc2a0d..d46a501c79 100644
--- a/Emby.Dlna/PlayTo/PlayToController.cs
+++ b/Emby.Dlna/PlayTo/PlayToController.cs
@@ -84,7 +84,7 @@ namespace Emby.Dlna.PlayTo
             _mediaEncoder = mediaEncoder;
         }
 
-        public bool IsSessionActive => !_disposed && _device != null;
+        public bool IsSessionActive => !_disposed && _device is not null;
 
         public bool SupportsMediaControl => IsSessionActive;
 
@@ -156,7 +156,7 @@ namespace Emby.Dlna.PlayTo
             try
             {
                 var streamInfo = StreamParams.ParseFromUrl(e.OldMediaInfo.Url, _libraryManager, _mediaSourceManager);
-                if (streamInfo.Item != null)
+                if (streamInfo.Item is not null)
                 {
                     var positionTicks = GetProgressPositionTicks(streamInfo);
 
@@ -268,7 +268,7 @@ namespace Emby.Dlna.PlayTo
             {
                 var info = StreamParams.ParseFromUrl(e.MediaInfo.Url, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null)
+                if (info.Item is not null)
                 {
                     var progress = GetProgressInfo(info);
 
@@ -299,7 +299,7 @@ namespace Emby.Dlna.PlayTo
 
                 var info = StreamParams.ParseFromUrl(mediaUrl, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null)
+                if (info.Item is not null)
                 {
                     var progress = GetProgressInfo(info);
 
@@ -441,11 +441,11 @@ namespace Emby.Dlna.PlayTo
         {
             var media = _device.CurrentMediaInfo;
 
-            if (media != null)
+            if (media is not null)
             {
                 var info = StreamParams.ParseFromUrl(media.Url, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null && !EnableClientSideSeek(info))
+                if (info.Item is not null && !EnableClientSideSeek(info))
                 {
                     var user = _session.UserId.Equals(default)
                         ? null
@@ -760,11 +760,11 @@ namespace Emby.Dlna.PlayTo
         {
             var media = _device.CurrentMediaInfo;
 
-            if (media != null)
+            if (media is not null)
             {
                 var info = StreamParams.ParseFromUrl(media.Url, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null)
+                if (info.Item is not null)
                 {
                     var newPosition = GetProgressPositionTicks(info) ?? 0;
 
@@ -791,11 +791,11 @@ namespace Emby.Dlna.PlayTo
         {
             var media = _device.CurrentMediaInfo;
 
-            if (media != null)
+            if (media is not null)
             {
                 var info = StreamParams.ParseFromUrl(media.Url, _libraryManager, _mediaSourceManager);
 
-                if (info.Item != null)
+                if (info.Item is not null)
                 {
                     var newPosition = GetProgressPositionTicks(info) ?? 0;
 
@@ -916,7 +916,7 @@ namespace Emby.Dlna.PlayTo
 
             public async Task<MediaSourceInfo> GetMediaSource(CancellationToken cancellationToken)
             {
-                if (_mediaSource != null)
+                if (_mediaSource is not null)
                 {
                     return _mediaSource;
                 }
@@ -926,7 +926,7 @@ namespace Emby.Dlna.PlayTo
                     return null;
                 }
 
-                if (_mediaSourceManager != null)
+                if (_mediaSourceManager is not null)
                 {
                     _mediaSource = await _mediaSourceManager.GetMediaSource(Item, MediaSourceId, LiveStreamId, false, cancellationToken).ConfigureAwait(false);
                 }
diff --git a/Emby.Dlna/PlayTo/PlaylistItemFactory.cs b/Emby.Dlna/PlayTo/PlaylistItemFactory.cs
index 6574913032..53cd05cfda 100644
--- a/Emby.Dlna/PlayTo/PlaylistItemFactory.cs
+++ b/Emby.Dlna/PlayTo/PlaylistItemFactory.cs
@@ -29,7 +29,7 @@ namespace Emby.Dlna.PlayTo
             var directPlay = profile.DirectPlayProfiles
                 .FirstOrDefault(i => i.Type == DlnaProfileType.Photo && IsSupported(i, item));
 
-            if (directPlay != null)
+            if (directPlay is not null)
             {
                 playlistItem.StreamInfo.PlayMethod = PlayMethod.DirectStream;
                 playlistItem.StreamInfo.Container = Path.GetExtension(item.Path);
@@ -40,7 +40,7 @@ namespace Emby.Dlna.PlayTo
             var transcodingProfile = profile.TranscodingProfiles
                 .FirstOrDefault(i => i.Type == DlnaProfileType.Photo);
 
-            if (transcodingProfile != null)
+            if (transcodingProfile is not null)
             {
                 playlistItem.StreamInfo.PlayMethod = PlayMethod.Transcode;
                 playlistItem.StreamInfo.Container = "." + transcodingProfile.Container.TrimStart('.');
diff --git a/Emby.Dlna/PlayTo/TransportCommands.cs b/Emby.Dlna/PlayTo/TransportCommands.cs
index 9c3a9103be..c463727329 100644
--- a/Emby.Dlna/PlayTo/TransportCommands.cs
+++ b/Emby.Dlna/PlayTo/TransportCommands.cs
@@ -31,7 +31,7 @@ namespace Emby.Dlna.PlayTo
 
             var stateValues = document.Descendants(UPnpNamespaces.ServiceStateTable).FirstOrDefault();
 
-            if (stateValues != null)
+            if (stateValues is not null)
             {
                 foreach (var container in stateValues.Elements(UPnpNamespaces.Svc + "stateVariable"))
                 {
@@ -77,7 +77,7 @@ namespace Emby.Dlna.PlayTo
             var element = container.Descendants(UPnpNamespaces.Svc + "allowedValueList")
                 .FirstOrDefault();
 
-            if (element != null)
+            if (element is not null)
             {
                 var values = element.Descendants(UPnpNamespaces.Svc + "allowedValue");
 
@@ -167,7 +167,7 @@ namespace Emby.Dlna.PlayTo
         {
             var state = StateVariables.FirstOrDefault(a => string.Equals(a.Name, argument.RelatedStateVariable, StringComparison.OrdinalIgnoreCase));
 
-            if (state != null)
+            if (state is not null)
             {
                 var sendValue = state.AllowedValues.FirstOrDefault(a => string.Equals(a, commandParameter, StringComparison.OrdinalIgnoreCase)) ??
                     (state.AllowedValues.Count > 0 ? state.AllowedValues[0] : value);