Why can't Visual Studio find my WPF InitializeComponent method?

Question

This is very strange.

I have an XAML file that looks as follows...

Answer 1

This happened to me because Visual Studio sets the "Build action" to some random action when you copy/paste or move an XAML file from one project to another within a solution.

Solution: Make sure your "Build action" is set to page for you XAML.

I hope this helps if it's the same case for you.