Entity framework in a layered architecture?

Question

Doing some experiments around WCF and Entity Framework. A couple of questions.

Option 1:

I understand that entity framework classes can be seria

Answer 1

Not to bring up an old post but... I found this listing when dealing with the exact same problem. We have WCF services and an Entity Framwork domain model. In the end I ended up making a T4 based on work by Danny Simmons that takes the EDMX and builds POCO message classes along with extension methods that map entity.ToMessage() and message.ToEntity(objectcontext).

This seemed like the best intermediate approach until .NET 4.0 since it requires no additional external project dependencies or hoops to jump through like the other methods I found (based on PostSharp).

If anyone else thinks this approach would be helpful let me know and I will post the link to the TT file on our googlecode site.