A Windows Communication Foundation (WCF) solution uses the following contracts. (Line numbers are included for reference only.) When the client calls GetMessage on the service interface, the service…

A Windows Communication Foundation (WCF) solution uses the following contracts. (Line numbers are included for reference only.) When the client calls GetMessage on the service interface, the service calls GetName on the client callback. In the client, the class NameService implements the callback contract. The client channel is created as follows. You need to ensure that the service callback is processed by the instance of NameService. What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)