After changing namespace in UserControl files, …g.cs files get errors

Question

I copied three classes in from another WPF project and then changed their namespaces.

Now when I run the project, I get errors in the \".g.cs\"

Answer 1

I had defined XML namespace shortcuts in my AssemblyInfo.cs

[assembly: XmlnsDefinition("http://www.example.com/wpf", "MyCorp.Wpf.OldNamespace")]

where the old namespace was still present. Searching through all my *.xaml files obviously did not help …

After fixing the shortcuts, the error went away immediately.