1 files changed, 6 insertions, 19 deletions
diff --git a/MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs b/MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs
index 22abf93ac..db177ff76 100644
--- a/MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs
+++ b/MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs
@@ -62,14 +62,14 @@ namespace MediaBrowser.MediaEncoding.Attachments
             var mediaSources = await _mediaSourceManager.GetPlaybackMediaSources(item, null, true, false, cancellationToken).ConfigureAwait(false);
             var mediaSource = mediaSources
                 .FirstOrDefault(i => string.Equals(i.Id, mediaSourceId, StringComparison.OrdinalIgnoreCase));
-            if (mediaSource == null)
+            if (mediaSource is null)
             {
                 throw new ResourceNotFoundException($"MediaSource {mediaSourceId} not found");
             }
 
             var mediaAttachment = mediaSource.MediaAttachments
                 .FirstOrDefault(i => i.Index == attachmentStreamIndex);
-            if (mediaAttachment == null)
+            if (mediaAttachment is null)
             {
                 throw new ResourceNotFoundException($"MediaSource {mediaSourceId} has no attachment with stream index {attachmentStreamIndex}");
             }
@@ -145,15 +145,8 @@ namespace MediaBrowser.MediaEncoding.Attachments
             bool isExternal,
             CancellationToken cancellationToken)
         {
-            if (string.IsNullOrEmpty(inputPath))
-            {
-                throw new ArgumentNullException(nameof(inputPath));
-            }
-
-            if (string.IsNullOrEmpty(outputPath))
-            {
-                throw new ArgumentNullException(nameof(outputPath));
-            }
+            ArgumentException.ThrowIfNullOrEmpty(inputPath);
+            ArgumentException.ThrowIfNullOrEmpty(outputPath);
 
             Directory.CreateDirectory(outputPath);
 
@@ -300,15 +293,9 @@ namespace MediaBrowser.MediaEncoding.Attachments
             string outputPath,
             CancellationToken cancellationToken)
         {
-            if (string.IsNullOrEmpty(inputPath))
-            {
-                throw new ArgumentNullException(nameof(inputPath));
-            }
+            ArgumentException.ThrowIfNullOrEmpty(inputPath);
 
-            if (string.IsNullOrEmpty(outputPath))
-            {
-                throw new ArgumentNullException(nameof(outputPath));
-            }
+            ArgumentException.ThrowIfNullOrEmpty(outputPath);
 
             Directory.CreateDirectory(Path.GetDirectoryName(outputPath));