Image Halftone in C# and SIlverlight

How can we make a halftone effect for a image in silverli开发者_StackOverflow社区ght using C#. Please help.. Thanx in advance.

First should be the algorithm itself: Algorithm to make halftone images? Or google..

Then you should use WritableBitmap to read input image and write output image. You might need to get some helper class to make reading and writing easier and more intuitive.