title: Determining when Listbox has finished loading bound elements
body: <p>I have a ListBox bound to a collection of objects, and everything works except I don't know how to call some code I need executed when an item in the list is selected.</p>
  
  <p>To be clear, I have already hooked up the  <code>Listbox_SelectionChanged</code> event for when the user <em>selects a different</em> item - and that works fine.</p>
  
  <p>When the ListBox <em>is first shown</em>, though, I want to call that same code on the first item in the list, which it defaults to. Something like <code>ListBox_BoundDataFinishLoading</code>, or something..</p>
  
  <p>Any ideas?</p>