title: Copy color from one shape to another in PowerPoint
body: <p>I have tried this:</p>
  
  <pre><code>var background_color = presentation.Slides[1].Shapes[1].Fill.BackColor.RGB;
  
  presentation.Slides[1].Shapes[2].Fill.BackColor.RGB = background_color;
  </code></pre>
  
  <p>but it doesn't set the color. I would appreciate any help.</p>