I created a WCF service library project in my solution, and have service references to this. I use the services from a class library, so I have references from my WPF applic
I found my answer here: http://www.lukepuplett.com/2010/07/note-to-self-don-let-wcf-svcutil-reuse.html
Long story short: I unchecked Reuse types in reference assemblies from the Advanced menu.
I don't know if this matters but i'm not using MVC, but Web Forms.