[.net] How to automatically select all text on focus in WPF TextBox?

This seems to work well for me. It's basically a recap of some earlier posts. I just put this into my MainWindow.xaml.cs file in the constructor. I create two handlers, one for keyboard, and one for the mouse, and funnel both events into the same function, HandleGotFocusEvent, which is defined right after the constructor in the same file.

public MainWindow()
{
   InitializeComponent();

   EventManager.RegisterClassHandler(typeof(TextBox), 
      UIElement.GotKeyboardFocusEvent,
      new RoutedEventHandler(HandleGotFocusEvent), true);
   EventManager.RegisterClassHandler(typeof(TextBox),
      UIElement.GotMouseCaptureEvent,
      new RoutedEventHandler(HandleGotFocusEvent), true);   
}
private void HandleGotFocusEvent(object sender, RoutedEventArgs e)
{
   if (sender is TextBox)
      (sender as TextBox).SelectAll();
}

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