Recently I made a free Windows 8 Application, Pixel Hero [http://apps.microsoft.com/windows/en-us/app/pixel-hero/8742b5e0-0d30-4cb1-90fc-0a9010fb6023] , and as part of this process I needed to use file and image APIS throughout the app. These APIS are modern C# 4.5 APIs so they expose Async methods throughout.