New Post: UsingColors Example

Can anyone explain what the code is doing on this page: https://magick.codeplex.com/wikipage?title=Using%20colors&referringTitle=Documentation

I'm attempting to replace a green screen background with a transparent background, but this code doesn't seem to work. I added: image.Write(fileName); to my code and a new file is saved, but the background isn't removed.

I'm just looking for a quick and easy way to remove a green screen background.

Thanks!