title: How to add items to ComboBox at runtime using C#
body: <p>My goal is to have a user click on a <code>ComboBox</code>, type text in <code>ComboBox</code> and then hit enter and add that text as an item on the list.</p>
  
  <p>My main problem is I don't know what event to use. I've looked through all of them and I didn't find any that I think would work for this kind of situation.</p>
  
  <p>If there is an easier way to do this other than a <code>ComboBox</code> please mention it.</p>