Dispatcher.Yield Method ()
Creates an awaitable object that asynchronously yields control back to the current dispatcher and provides an opportunity for the dispatcher to process other events.
Assembly: WindowsBase (in WindowsBase.dll)
This method provides a way for you to temporarily release execution control to the current dispatcher so it can do other work, such as process other events. Use the await, or Await in Visual Basic, operator on the return value to return control to the current dispatcher. Use this method if want to give your app a chance to process events while you app is doing a lot of work on the UI thread. For example, you can use this method in a long-running loop that updates a control.
Available since 4.5