“Go To Definition” in Visual Studio only brings up the Metadata

Question

I am working in a Web Project in Visual Studio 2008. When I hit F12 (or right-click and select Go To Definition) Visual Studio is consistently going to the Metadata file in

Answer 1

Just found another cause. I upgraded my web project to 4.0 but left the class libraries at 2.0. At that point all the class libraries in my solution were treated as file references from my web project. Might help someone else...