C# Autolevel snippet?

Has anyone seen any good snippets for autol开发者_如何学Pythoneveling an image in C#?

See http://code.google.com/p/aforge/

The source code for Paint.net might be a good place to rummage around for various examples of image processing with .NET. In fact, auto-level is a basic feature of Paint.NET, you just need to dig it out!