title: Rotate ImageSource?
body: <p>I am drawing at dc (DrawingContext) of a <code>Grid</code> like this:</p>
  
  <pre><code>dc.DrawImage(_imageSource, new Rect(x, y, width, height);
  </code></pre>
  
  <p>But, what if I wanted to rotate the image I am drawing on drawing context?</p>
  
  <p>I know I can push effect to drawing context, but, it will affect all the drawings, while I want to rotate only drawing of <code>_imageSource</code>.</p>
  
  <p>Any idea?</p>