title: Combined image from List<Bitmap> images not appearing in ImageColumn
body: <p>On my current project, there are several instances where a row of indicators (using 26x26 PNG icons) is required.  In this case, it's a <code>DataGridView</code> (more specifically, a Telerik <code>RadGridView</code>). The images are loaded from the resource file and are present. </p>
  
  <p>My current code defines these indicators as a row is created:</p>
  
  <pre><code>Bitmap indicators;
  List&lt;Bitmap&gt; content = new List&lt;Bitmap&gt;();
  
  if (l.Condition1 == true)
      content.Add(myProj.Properties.Resources.One);
  if (l.Condition2 == true)
      content.Add(myProj.Properties.Resources.Two);
  if (l.Condition3 == true)
      content.Add(myProj.Properties.Resources.Three);
  
  if (content.Count() != 0)
  {
      int width = content.Select(w =&gt; w.Width).Sum();
      indicators = new Bitmap(width, 26);
      using (Graphics g = Graphics.FromImage(indicators))
      {
          int origin = 0;
          foreach (Bitmap p in content)
          {
              g.DrawImage(p, new Point(origin, 0));
              origin += p.Width;
          }
  
          row.Cells[15].Value = indicators;
      }
  }
  </code></pre>
  
  <p>Unfortunately, this code doesn't work (the images don't display at all) and I can't quite sort out what I've missed. Assigning an image to the <code>Value</code> property works if I just load one image and don't use the loop.  What have I overlooked that is preventing this from working and these indicators displaying?</p>