c# Image transform to parallelogram

Quick question, and is probably a simple answer. I have a squ开发者_开发技巧are image but I want to squish it so that it is a parallelogram (this is so I can draw some cubes isometrically)

I currently have my images stored in an Image class.

Maybe this is helpful: http://www.vcskicks.com/image-distortion.php

This code squishes an image into any quadrangle, not just a parallelogram.