title: How do I get the Source of an Image on GestureCompleted
body: <p>I want to find the URI of an Image on the phone screen when the image is dragged.
  I have many images on the screen and I need to know which one has been dragged, I can easily find that from the filename of the image as they are named <code>A.png, B.png and so on</code>.</p>
  
  <pre><code>    private void OnGestureCompleted(object sender, Microsoft.Phone.Controls.GestureEventArgs e){
          Image image = sender as Image;
          TranslateTransform transform = image.RenderTransform as TranslateTransform;
          //storing the final values after the gesture is complete
          xFin = (e.GetPosition(null).X);
          yFin = (e.GetPosition(null).Y);
          //failed attempts to convert adress to string
          MessageBox.Show(image.Source.ToString());
      }
  </code></pre>
  
  <p>This returns <code>System.Windows.Controls.Image</code>.
  and this on the other hand throws an exception stating that ConvertToString hasn't been implemented.</p>
  
  <pre><code>ImageSourceConverter convertor = new ImageSourceConverter();
  string location = convertor.ConvertToString(image);
  MessageBox.Show(location);
  </code></pre>
  
  <p>Is there some way this can be done?</p>