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RobReno (7) [Avatar] Offline
#1
In Visual Studio 2012 the ADO.NET Entity Data Model template behaves differently than in Visual Studio 2010. So here is a heads up for those who might run into this issue.

The EF Designer in Visual Studio 2012 also has some new features:

DbContext code generation for new models means that any new models created using the EF Designer will generate
a derived DbContext and POCO classes by default. You can always revert to ObjectContext code generation if needed.
Existing models will not automatically change to DbContext code generation.

http://blogs.msdn.com/b/adonet/archive/2012/08/15/ef5-released.aspx

Solution Here:

1. Delete .tt files
2. Regenerate EDM Model from database
3. Change Code Generatin Strategy to Default and compile

This switches from DbContext back to ObjectContext

http://social.msdn.microsoft.com/Forums/en-US/adodotnetentityframework/thread/cb76200f-387e-4e72-9f35-8c2a56f3e020