Controlling caching of BitMapImage under WinRT

By default Bitmap Images are cached by WinRT with no intervention required by the developer.  Often times this is a good thing but there are some occasions where this is undesirable.  Although there doesn’t appear to be any obvious control in the API reference I have found that adding a dummy querystring to the BitMapImage source filename reference does the trick and also can offer precise control over the length of caching required (if any) .

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