Use the OperationContextScope class to create a scope for a specific OperationContext object or a scope for a new OperationContext object using a specified IContextChannel object. An OperationContextScope can be used in a Windows Communication Foundation (WCF) service or WCF client application.
Once the OperationContextScope object has established the current operation context, you can use the OperationContext to:
Access and modify incoming and outgoing message headers and other properties.
Access the runtime, including dispatchers, the host, channel, and extensions.
Access other types of contexts, such as security, instance, and request contexts.
Access the channel associated with the OperationContext object or (if the channel implements System.ServiceModel.Channels..::.ISession) the associated channel's session identifier.
When an OperationContextScope is created, the current OperationContext is stored and the new OperationContext becomes the one returned by the Current property. When the OperationContextScope is disposed, the original OperationContext is restored.