Test Driving WPF

I'm kind of new to WPF and trying to TDD an application that uses it.  I'm a little frustrated that Microsoft's default program architecture still isn't TDD friendly.  It creates an application project and adds a window and an app level resource dictionary, none of which can be tested because a test system requires a DLL it can load.  But if I create a new DLL, it loses connection to the base resources because that's in the exe and not available in testing.

So the architecture seems wrong, and I don't know what's a more ideal way to proceed.  Or, is there something I'm missing about testing UI code.
 
Alan Baljeu