title: Order of event handler execution
body: <p>If I set up multiple event handlers, like so:</p>
  
  <pre><code>_webservice.RetrieveDataCompleted += ProcessData1;
  _webservice.RetrieveDataCompleted += ProcessData2;
  </code></pre>
  
  <p>what order are the handlers run when the event <code>RetrieveDataCompleted</code> is fired? Are they run in the same thread and sequentially in the order that are registered?</p>