If you are getting an error like : Cannot resolve KeyInfo for unwrapping key: KeyInfo 'SecurityKeyIdentifier and your have checked that your certificate is in the right store and right place. So this might be the reason. check the binding you have...

I am going to attend Tech Ed China 2007 again. I am very excited about it. http://www.microsoft.com/china/technet/teched/speakers/default.mspx

There are two options: 1. OperationContext.Current. Pros: This is pretty straightforward and relatively hard to discover. Cons: This is a thread local storage, and you are invoking a async call, it does not work well. 2. ChannelParameterCollection...