title: Prevent LostFocus from being triggered when children elements lose focus
body: <p>I have a User Control that has several children elements, including checkboxes and textboxes. </p>
  
  <p>I would like to trigger the LostFocus event for my User Control <strong>only</strong> when the focus is lost on the entire User Control (e.g. clicking a button outside of the User Control). </p>
  
  <p>Currently, the LostFocus event is also triggering when I move between children elements of my User Control, e.g. from one textbox to another. </p>