Read original post by Hermit Dave at Invoke IT Blog
Previously i discussed issues i had with #win8dev and #wpdev and using async task mechanism – http://invokeit.wordpress.com/2012/10/15/async-await-and-onnavigatedto-wpdev-win8dev/. With #wpdev you have to consume that mechanism as long as you use async CTP.
So how does one go about doing it in #win8dev #winrt correctly ? We start by marking all methods as async (in this case OnNavigatedTo. If we were firing mutilple calls and possibly making UI calls, #win8dev async implementations is a breeze.