Silverlight 4: Image Resizer

I want to know how to resize an image in Silverlight without using any 3rd party DLL such as FJC开发者_开发百科ore and the like

Thanks

Heres a very good Video Cast about Silverlight Optimization and Profiling (you can find what you want in 28 minute of video)

http://channel9.msdn.com/Events/MIX/MIX11/MED07

And here you can find source code from this talk

http://blogs.msdn.com/b/slperf/archive/2011/04/15/silverlight-performance-mix-11.aspx