I created new project and added the newest entity framework to it (version 4.3). I created classes and the context as in previous EF versions. However, during the very first
Could you try removing your constructor to make EF use it's default connection string.
public Context() : base("MyConnection")
{
}
Failing that, could you try updating your database from the Package Manager Console to see if you get any further information.
Update-Database -Verbose
Possibly unrelated in your case, but I get the same error when using MvcMiniProfiler 1.9. If you are using it too, make sure EF profiling is turned off by commenting out the line:
//MiniProfilerEF.Initialize();
Within the MiniProfiler App_Start.
For others experiencing a similar issue, I have found that reenabling migrations from the Package Manager Console can help in certain cases. Make sure you have a copy of your Migration configuration before doing this.
Enable-Migrations -Force