wpf The type name 'App' does not exist in the type ... occurs after renaming MainWindow

Question

In a simple WPF, I have renamed MainWindow class to MyClass and I got this error in App.g.cs:

    public static void Main() {
        MyClass.App app = new MyClass.App();
        app.InitializeComponent();
        app.Run();
    }

How can I fix this can't find anything on the internet ?

Answer 1

I accidentally got this error, in my case I had a class with the same name as the namespace. Renaming the class solved the problem.

Answer 2

Do not name a class the same as its namespace

Check out if you don't have a class somewhere in your project that has the same name as your namespace!

for example:

namespace HashCalculator
{
  public class HashCalculator

Answer 3

App.g.cs is produced by compiling App.xaml into C# code. The problem is in your App.xaml. Without seeing it, I can't be sure exactly what, but you probably just need to alter the StartupUri to StartupUri="MyClass.xaml".