I'm using the WAF-Framework for building a MVVM-Application. I got my own App-Class (App.xaml and App.xaml.cs).
Everytime I try to compile my application I get 3 different error messages:
I had something very similar recently, and it turned out that when importing existing code files I had imported the
obj directory itself!
This directory contained, for example, the auto-generated (and automatically imported)
MainWindow.g.i.cs file. So I was effectively including the same partial class definition twice, hence the "already defined" errors.
Excluding this folder from the project and rebuilding the solution works to resolve the errors.