title: load image into writeablebitmap
body: <p>So Im trying trying to load an image into a WriteableBitmap but I'm getting a NullReferenceException. Can't figure out why because I think this used to work before</p>
  
  <p><code>BitmapImage b = new BitmapImage(new Uri(@"images/Car.jpg", Urikind.Relative));</code>
      <code>WriteableBitmap wb = new WriteableBitmap(b);</code></p>
  
  <p>thats it. I have the car image as a resource in my project. It works fine as I can create a Image control and set its source to the BitmapImage and display it.
  Thanks</p>