title: EF4 db-first: how to add missing relationships
body: <p>I am using db-first to creating object model for a readonly database, but some relationships are not automatically picked up. For example in Foo.BarId is not automatically connected to  Bar object. If I click on BarId property, I don't see anything to associate it to a Bar in the context menu or properties window. How can I manually claim foreign keys without messing up anything?</p>