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

Please don't over complicate the answer several ways to skin a cat but, less code the better I would presume.

Petermac's option is the way to go for me.

Add "GotFocus" in the main Xaml window to the control eg."textbox"

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

or I like this option

    private void Filename_GotFocus(object sender, RoutedEventArgs e)
    {
        Filename.clear();            
    }

the question asked was just to empty the textbox.