title: Global event handler
body: <p>How can I define one global GridViewColumnHeader.Click handler for any ListView.GridViewColumnHeader in my project?</p>
  
  <p>I mean is it possible to set a Style or a Template in app.xaml for TargetType=GridViewColumnHeader so any columnheader in any listview in the project would response to the method in app.xaml.cs?</p>