http://blogs.msdn.com/b/andy_wigley/archive/2013/02/07/async-and-await-for-http-networking-on-windows-phone.aspxUsing async and await for executing long-running operations such as networking calls has many benefits: your code is much cleaner and easier to maintain, the result is automatically marshalled back to the originating thread so you don’t need to use Dispatcheren-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)