Development Tip – Dispatching calls to the UI thread

In Silverlight and WPF, if you wanted to update the UI from a thread you had launched, it was important that the UI update be executed on the UI thread, lest you get an invalid-cross-thread-access error.

You could ensure this by initially getting a pointer to the dispatcher for the UI thread, and then asking it to run your code. Something like this:

_OriginalDispatcher = Application.Current.RootVisual.Dispatcher;

_OriginalDispatcher.BeginInvoke(myAction);

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