As you might have already noticed, the BackGroundWorker class is missing in Windows RT / app development. The BackgroundWorker was actually just a wrapper for the following class:System.Threading.ThreadPool. So the fun begins again with Threading. The ThreadPool for Win RT is well documented in the Windows Store Apps Development Center:http://msdn.microsoft.com/en-us/library/windows/apps/windows.system.threading.threadpool.aspx For those, who like to ...