I'm currently working on a WCF service that reaches out to another service to submit information in a few of its operations. The proxy for the second service is generated through the strongly typed ProxyFactory<T> class. I haven't experienced any issues but have heard I should do something like the following when making the call:

using (new OperationContextScope((IContextChannel)_service))
     _service.Send(message);

So my question is: when is creating this new OperationContextScope appropriate, and why?

Thanks!