In his latest "Data Points" article in MSDN Magazine online, John Papa demonstrates how binary encoding works, the effect it has on an application's performance, and how it behaves by demonstrating it in action.
I will also walk through several techniques that can be used to pass exception information using undeclared and declared faults from Windows Communication Foundation (WCF) Web services to Silverlight. I will start by demonstrating what happens when an exception occurs and how to add some quick changes to the configuration to show information while debugging. Then, I will show you how to set up a strategic fault pattern to handle the passing exception information over SOAP services, using declared faults. All code is based on the Silverlight 3 beta and accompanies this article online.