by Jim
Nov 21, 2008 10:38 AM
We were getting this error in the design view for our WPF application, only on some machines:
Could not create an instance of type 'TypeExtension'
The class reference was resolving correctly; if it doesn’t you get an error message to that effect. however the reference was to a class defined in a different project; this seemed to be the root of the problem.
Turns out this is a designer bug that is fixed in Visual Studio Service Pack 1. Check your version on Visual Studio’s about dialog; if you don’t see an “SP” in the version you need the service pack.