I replace BsonDefaults.GuidRepresentation = GuidRepresentation.Standard; by BsonSerializer.RegisterSerializer(new GuidSerializer(GuidRepresentation.Standard)); to set all my app use Standard representation, 

But if I do Builders<MyEntity>.Filter.Eq("_id", myGuid);, the filter is translated with CSUUID(...) in place of UUID(...).

In more largest case, how I can specify Guid representation with this type of filter ?