Changing the cursor in WPF sometimes works, sometimes doesn't

Question

On several of my usercontrols, I change the cursor by using

this.Cursor = Cursors.Wait;

when I click on something.

Now I want to do

Answer 1

If your application uses async stuff and you're fiddling with Mouse's cursor, you probably want to do it only in main UI thread. You can use app's Dispatcher thread for that:

Application.Current.Dispatcher.Invoke(() =>
{
    // The check is required to prevent cursor flickering
    if (Mouse.OverrideCursor != cursor)
        Mouse.OverrideCursor = cursor;
});