title: WPF Binding a Listbox to thing that has sub enumerables
body: <p>I have a class like this:</p>
  
  <pre><code>public class UIThing {
     public string Name{get;set}
     public IEnumerable&lt;Thing&gt; LotsOfThings;
  }
  </code></pre>
  
  <p>I have some of these in a <code>List</code> (<code>List&lt;UIThings&gt;</code>) and I would like to bind them into a <code>ListBox</code> so that the LotsOfThings member is expanded as items in the <code>ListBox</code>. Like a list of lists I guess. But I can't get my head around the <code>DataTemplate</code> needed.</p>
  
  <p>Any Ideas?</p>