Asynchronous programming in .NET (Windows Store apps using C#/VB/C++ and XAML)
This section discusses calling asynchronous APIs in the Windows Runtime from C# and Microsoft Visual Basic.
The Windows Runtime includes many asynchronous APIs to ensure that your app remains responsive when it does work that might take an extended amount of time. This topic discusses how to use asynchronous methods from the Windows Runtime in C# or Visual Basic.
Build date: 11/29/2012