How to access WPF MainWindow Controls from my own .cs file

Question

I am a NOVICE and am very much struggling with what seems should be a very simple task. How do I modify a property of a MainWindow TextBlock, from ano

Answer 1

To extend on what Nathan said, I used a safe cast:

(System.Windows.Application.Current.MainWindow as MainWindow)?.TextBlock1.Text = "Setting Text from My Program";

Note the comments on the answer Nathan gave. This isn't ideal but it works.