title: How can a separator be added between items in an ItemsControl
body: <p>I'm needing to display a list of numbers from a collection in an Items Control.  So the items are: <code>"1", "2", "3"</code>.</p>
  
  <p>When they are rendered, I need them separated by a comma (or something similar).  So the above 3 items would look like this: <code>"1, 2, 3"</code>.</p>
  
  <p>How can I add a separator to the individual items, without having one tacked on the end of the list?</p>
  
  <p>I am not stuck on using an ItemsControl, but that's what I had started to use.</p>