Enumerable: Yeah that's still the issue, and I'm pretty sure its RIA related. I can see it working in your demo project - and yet every time I recreate it, I get the same error. Any idea on paths to troubleshoot? (I did install RIA just last week so I don't know if that's part of the issue)

Scouring all the differences between your working code and the project I developed was how I found that the domain objects were set to Server.Service. Now I also know its generated with a t4 somewhere - if it just gave us access to that t4 then we could adjust it!

About the References:
Well - the service gets its references when you add it to the .Server.Data project, but then when you move it - it doesn't have them anymore. I ended up just creating a blank service and deleting it - which recreated those references. It was just missing from your example is all, only reason I mentioned it.

Again any help on troubleshooting why RIA isn't projecting correctly would be appreciated. Thank you!