[c#] Error CS2001: Source file '.cs' could not be found

I had this problem, too.

Possible causes in my case: I had deleted a duplicated view twice and a view model. I reverted one of the deletes and then the InitializeComponent error appeared. I took these steps.

  1. I checked all of the solutions mentioned on this question. The class name and build action were correct.
  2. I Cleaned my Solution and rebuilt. Another error appeared. "Error CS2001: Source file '.cs' could not be found"
  3. I found this answer and followed the steps.
  4. I reloaded the project and cleaned/rebuilt again.
  5. My solution builds without errors and my application works now.