If you are using Visual Studio 2012 to create a WPF application, and open it in Micosoft Blend 4, it is likely that you can only see the XAML file, but cannot switch to design view.
To solve this, in Visual Studio 2012, change the default .Net Framework from 4.5 to 4.0:
Reopen the solution in Blend 4, it works!
Filed under: Dotnet/C# Tagged: cannot, design view, Expression Blend, visual studio 2012
