Calculate image differences in C#

Question

How could I generate a System.Drawing.Image that contains the differences between the pixels of two other images?

Something similar to GitHub does, but writ

Answer 1

A quick google search yielded this:

http://www.bryancook.net/2009/10/find-differences-between-images-c.html

If your're going to be using ARGB rather then RGB, it'll probably need a bit of editing. If you wanted to get that 'inverted difference' effect, like in the Github link posted, you could find the differance between RGB colors and use that for each pixel in the difference image, etc.