WPF Application fails on startup with TypeInitializationException

Question

I have a simple WPF application which I am trying to start. I am following the Microsoft Patterns and Practices \"Composite Application Guidance for WPF\". I\'ve followed

Answer 1

For me, I had copied app settings over from another application into my app.config into a new section called "userSettings". However, there needs to be a "configSections" also added to the app.config which defines "userSettings". I deleted the userSettings section then edited the app settings and saved it. VS automatically creates the correct "userSettings" and "configSections" for you if they are absent.