Merge pull request #5402 from Ullmie02/fix-null-size

Use FileShare.None when creating files

(cherry picked from commit 480dd66428)
Signed-off-by: Joshua M. Boniface <joshua@boniface.me>

MediaBrowser.LocalMetadata/Savers/BaseXmlSaver.cs

@@ -133,7 +133,8 @@ namespace MediaBrowser.LocalMetadata.Savers
             // On Windows, savint the file will fail if the file is hidden or readonly
             FileSystem.SetAttributes(path, false, false);
 
-            using (var filestream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read))
+            // use FileShare.None as this bypasses dotnet bug dotnet/runtime#42790 .
+            using (var filestream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None))
             {
                 stream.CopyTo(filestream);
             }