title: new APIs for windows phone 8.1
body: <p>I am trying to use these two methods (of WP 8) in windows phone 8.1, but it gives error and doesn't compile, most probably becasue they are removed. I tried searching the new APIs but couldn't get any. What are other alternatives for these.</p>
  
  <p><code>Dispatcher.BeginInvoke( () =&gt; {});</code> <a href="http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.begininvoke%28v=vs.110%29.aspx">msdn link</a></p>
  
  <p><code>System.Threading.Thread.Sleep();</code> <a href="http://msdn.microsoft.com/en-us/library/274eh01d%28v=vs.110%29.aspx">msdn link</a></p>