Entity framework and inheritance: NotSupportedException?

As you infer, it looks like the Context is fetching a Comment as a Message (not knowing that it is a comment). Later, you ask for the actual Comment, so the context fetches the Comment. Now you have two object instances in the Context with the same ID - one is a Message and one is a Comment.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.