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Initializing the DispatcherHelper for WP7 - where?

Aug 8, 2010 at 10:26 AM

The docs say to initialise the DispatcherHelper during Application_Startup when the MainPage is assigned to the Root Visual. In the latest MVVM light the RootVisual is assigned in  


However the comment says

// Do not add any additional code to this method

I have ignored this comment for now and added the following after the RootVisual is assigned: DispatcherHelper.Initialize();

Any thoughts on where this should really go?

BTW If you don't initialise this you get a NullReferenceException when calling

CheckBeginInvokeOnUI (might be nice if MVVM Light checked for this in debug mode and put out some helpful hint about intitialising the DispatcherHelper).

Aug 11, 2010 at 10:11 AM
I was clearly being stupid, you can obviously subscribe to Startup in the App constructor: this.Startup += new StartupEventHandler(App_Startup);