title: save current view to bitmap WP7
body: <p>I just started to WP7 Dev, and I would like a bit of help on solving this:
  I have a <code>Canvas</code> in wich I have 2 <code>StackPanels</code> where I draw like 10 <code>Rectangle</code>. So my question is, how do I save the canvas to a <code>Bitmap</code>?</p>
  
  <p>here is what I want to achieve, that from this:</p>
  
  <p><img src="https://i.stack.imgur.com/CJAsM.png" alt="enter image description here"></p>
  
  <p>I get this:</p>
  
  <p><img src="https://i.stack.imgur.com/LQSgt.png" alt="enter image description here"></p>
  
  <p>Any help that points me in the right direction would be much appreciated.</p>