Remove text after clicking in the textbox

Question

When you activate an application, a textbox with text \"hello\" will appear.

My question is:
When you click on the textbox in order to make input data, I want to rem

Answer 1

I just did this:

XAML:

Code behind:

 private void Filename_GotFocus(object sender, RoutedEventArgs e)
        {
            Filename.Text = "";            
        }