Serialize GUID without dashes

MediaBrowser.Common/Json/Converters/JsonGuidConverter.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
@@ -19,7 +20,7 @@ namespace MediaBrowser.Common.Json.Converters
         /// <inheritdoc />
         public override void Write(Utf8JsonWriter writer, Guid value, JsonSerializerOptions options)
         {
-            writer.WriteStringValue(value);
+            writer.WriteStringValue(value.ToString("N", CultureInfo.InvariantCulture));
         }
     }
 }

tests/Jellyfin.Common.Tests/Json/JsonGuidConverterTests.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using System.Text.Json;
 using MediaBrowser.Common.Json.Converters;
 using Xunit;
@@ -46,7 +47,15 @@ namespace Jellyfin.Common.Tests.Json
         [Fact]
         public void Serialize_EmptyGuid_EmptyGuid()
         {
-            Assert.Equal($"\"{Guid.Empty}\"", JsonSerializer.Serialize(Guid.Empty, _options));
+            Assert.Equal($"\"{Guid.Empty:N}\"", JsonSerializer.Serialize(Guid.Empty, _options));
+        }
+
+        [Fact]
+        public void Serialize_Valid_NoDash_Success()
+        {
+            var guid = new Guid("531797E9-9457-40E0-88BC-B1D6D38752FA");
+            var str = JsonSerializer.Serialize(guid, _options);
+            Assert.Equal($"\"{guid:N}\"", str);
         }
     }
 }