title: Alternative to System.Drawing.Bitmap in Silverlight which is compatible with WPF
body: <p>I'm trying to cross compile some libraries for WPF and Silverlight.
  Currently one of the libraries depends on System.Drawing.Bitmap which is not available in Silverlight.</p>
  
  <p>It's a class that represents a device specific image format,
  and holds a reference to a Bitmap instance in order to display this image
  in a WPF application.</p>
  
  <p>What could I use instead of the Bitmap class in order to hold a reference
  to an Image which I can display in both silverlight and wpf ? (cannot be file based, must be in memory).</p>