title: Can't use Image.FromStream for .ai file
body: <p>I am trying to convert an .ai file to Image, but the line </p>
  
  <pre><code>Image.FromStream(new MemoryStream(Utils.LoadImage("icon.ai")))
  </code></pre>
  
  <p>returns invalid operation exception.
  The function Utils.LoadImage returns a byte[].
  Here is the rest of the code:</p>
  
  <pre><code>ZipArchiveEntry hus_icon = zip.CreateEntry("icon.ai");
      using (Stream photoStream = hus_icon.Open())
      {
          var image = Image.FromStream(new MemoryStream(Utils.LoadImage("icon.ai")));
          var imageBmp = new Bitmap(image);
          imageBmp.Save(photoStream, image.RawFormat);
       }
  </code></pre>