Small fix

papafe · papafe · commit a59ad0fee11c · 2025-07-08T14:05:06.000+02:00
diff --git a/src/MongoDB.Bson/IO/BsonWriterSettings.cs b/src/MongoDB.Bson/IO/BsonWriterSettings.cs
@@ -26,7 +26,7 @@ public abstract class BsonWriterSettings
         // private fields
         private bool _isFrozen;
         private int _maxSerializationDepth = BsonDefaults.MaxSerializationDepth;
-        private IBsonSerializationDomain _serializationDomain;
+        private IBsonSerializationDomain _serializationDomain = BsonSerializer.DefaultSerializationDomain;
 
         // constructors
         /// <summary>
diff --git a/src/MongoDB.Driver/Core/WireProtocol/Messages/Encoders/BinaryEncoders/MessageBinaryEncoderBase.cs b/src/MongoDB.Driver/Core/WireProtocol/Messages/Encoders/BinaryEncoders/MessageBinaryEncoderBase.cs
@@ -104,7 +104,7 @@ public BsonBinaryWriter CreateBinaryWriter()
                 writerSettings.MaxDocumentSize = _encoderSettings.GetOrDefault(MessageEncoderSettingsName.MaxDocumentSize, writerSettings.MaxDocumentSize);
                 writerSettings.MaxSerializationDepth = _encoderSettings.GetOrDefault(MessageEncoderSettingsName.MaxSerializationDepth, writerSettings.MaxSerializationDepth);
                 writerSettings.SerializationDomain =
-                    _encoderSettings.GetOrDefault<IBsonSerializationDomain>(MessageEncoderSettingsName.SerializationDomain, null); //TODO Using null here to find issues faster
+                    _encoderSettings.GetOrDefault<IBsonSerializationDomain>(MessageEncoderSettingsName.SerializationDomain, writerSettings.SerializationDomain);
             }
             return new BsonBinaryWriter(_stream, writerSettings);
         }

Original file line number	Diff line number	Diff line change
`@@ -104,7 +104,7 @@ public BsonBinaryWriter CreateBinaryWriter()`
`104`	`104`	`writerSettings.MaxDocumentSize = _encoderSettings.GetOrDefault(MessageEncoderSettingsName.MaxDocumentSize, writerSettings.MaxDocumentSize);`
`105`	`105`	`writerSettings.MaxSerializationDepth = _encoderSettings.GetOrDefault(MessageEncoderSettingsName.MaxSerializationDepth, writerSettings.MaxSerializationDepth);`
`106`	`106`	`writerSettings.SerializationDomain =`
`107`		`- _encoderSettings.GetOrDefault<IBsonSerializationDomain>(MessageEncoderSettingsName.SerializationDomain, null); //TODO Using null here to find issues faster`
	`107`	`+ _encoderSettings.GetOrDefault<IBsonSerializationDomain>(MessageEncoderSettingsName.SerializationDomain, writerSettings.SerializationDomain);`
`108`	`108`	`}`
`109`	`109`	`return new BsonBinaryWriter(_stream, writerSettings);`
`110`	`110`	`}`