Commented Feature: Delta doesn't support abstract class [450]

As we are supporting abstract base type, we should make Delta<T> to support abstract as well.<br /><br />Current definition of Delta<T> is: <br /><br />public class Delta<TEntityType> : DynamicObject, IDelta<TEntityType>, IDelta where TEntityType : class, new()
Comments: http://aspnetwebstack.codeplex.com/SourceControl/changeset/ac3a5565fb31