Create Thumbnail of HtmlImage

Question

I am trying to create a thumbnail of HtmlImage.

I was trying to use GetThumbnailImage but the system states that htmlimage does not contain a definition for GetThumbnailImage.

I am trying to do something like this:

System.Drawing.Image im = (System.Drawing.Image)i.GetThumbnailImage(100, 100, null, new System.IntPtr());

where i is my HtmlImage. I tried casting it ((System.Drawing.Image)). Could anyone point me in the right direction or provide an idea on how to solve it?

Thank you.