How to select all text in TextBox WPF when focus?

Question

I have tried the below code to select all text in textbox when focus. But this is not working.

XAML:

Answer 1

You could use the dispatcher:

private void TextBox_GotFocus(object sender, RoutedEventArgs e)
{
    TextBox textBox = (TextBox)sender;
    textBox.Dispatcher.BeginInvoke(new Action(() => textBox.SelectAll()));
}