From a Microsoft Forums Post: ( see full post here ).
There are two separate concerns here - the base model (EF), and the WCF/mex layer. Your additional properties will not be part of the edmx model, but I wonder if the issue isn't more related to the WCF/mex aspect.
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.