From scratch, I made a new solution with two projects: one was MVC 3 and the other a supporting EF 4.2 project. The whole thing builds successfully. From the MVC project I
I found thjis helped when I had this problem:
Uninstalled the pre-release version of EF and installed EF5 Went to Sql Server Object Explorer and deleted the db. Rebuilt the solution used PM> Update-Database -Verbose
Perhaps the problem was with pre-release EF or just cleansing the palate was all it needed.
I'm quite new to all of these but this did let me use the Add Controller scaffolding tool with the "MVC controller with read/write actions and reviews, using Entity Framework" template selected.