c# - Refresh control on orientation change? -

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i have custom panel control, built in mainpage.xaml.cs, , want redraw when orientation changes (because needs measure width of display how need it). haven't found way how anywhere online :/

declare in class 

private simpleorientationsensor _orientationsensor;

then use 

_orientationsensor = simpleorientationsensor.getdefault();         if (_orientationsensor != null)         {             _orientationsensor.orientationchanged += delegate              {                  // whatever need here             };         }

_orientationsensor must member of class, otherwise collected gc , event wont fire


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