title: how to add items to combo box in lightswitch
body: <p>I'm new to lightswitch and i searched lot, but couldn't find proper solution for this simple question. I need to add items to combo box, based on user selection. ( not from existing table)</p>
  
  <p>For example if user select country ,following towns must add to combo box.</p>
  
  <pre><code>USA - Texas, New York etc
  UK  - London , Surrey 
  </code></pre>
  
  <p>How can i do this? i'm using vb.net as my back end. i found this article <a href="http://hgminerva.wordpress.com/2012/01/08/how-to-create-an-unbound-combobox-in-microsoft-ligthswitch/" rel="nofollow">How to create an unbound combobox </a> as useful one. but couldn't able work according to my scenario.</p>
  
  <p>what is the way to add items to combo box?</p>