You are creating a Window s Communication Foundation (WCF) service application. The application needs to service many clients and requests simultaneously. The application also needs to ensure…

You are creating a Window s Communication Foundation (WCF) service application. The application needs to service many clients and requests simultaneously. The application also needs to ensure subsequent individual client requests provide a stateful conversation. You need to configure the service to support these requirements. Which attribute should you add to the class that is implementing the service?