Application.Current.Shutdown(-1) not closing WPF app

Question

I am checking if the windows authenticated user is a valid user for my wpf application or not.

If not, I need to shut down the application; but even after executing

Answer 1

I have never had luck shutting something down from the start-up. I would suggest starting a new Thread that, after some brief delay, shuts down the application using similar code that you have in your sample.

Answer 2

Use Environment.Exit() instead. That will try to shut down gracefully, but if it can't gracefully, will shut down rudely -- forcefully terminating threads.