UWP Application not run correctly on startup

Question

I used the following code to set up and test the startup, but when I reset the computer, my project is displayed below, and even my Message-Dialog is not displayed

[Article Source : Configure your app to start at log-in]

I use these codes : Code Source : Test Startup

I wanted to attach my code but an error occurred that you have to write a description!

My code is similar to the link above, only I show a Message-Dialog on public MainPage(), that's all.

Answer 1

According to this answer, my problem was solved, I copied the code in the above link to the App.xaml file and the problem was solved :)