title: How to draw shapes on top of Silverlight multiscaleimage?
body: <p>There is a multiscale image with deepzoom image as a source.  Now I need to allow users to draw poligons and lines on top of the multiscalimage in such a way that the shapes will follow drag and zoom to scale accordingly.</p>
  
  <p>I tried to add a canvas in addition to the multiscaleimage but can't figure out how to make them stick to each other on zoom or drags.</p>
  
  <p>If you have done any user shape drawing on top of deepzoom image, please share your methods.</p>
  
  <p>Thanks,
  Val</p>