You have a Windows Communication Foundation (WCF) service that accepts the following message contract.[MessageContract(WrapperNamespace="http://www.movies.com", ProtectionLevel=ProtectionLevel.None)] public class Ticket{ [MessageBodyMember(Namespace="http://www.movietheater.com", Order=1)] public DateTime ShowTime = DateTime.Now; [MessageBodyMember(Namespace="http://www.movietheater.com")] public string ReservationName = "Smith"; [MessageBodyMember(Namespace="http://www.movietheater.com")] public int NumberOfSeats = 0;}
You need to ensure that the client sends a SOAP body that is accepted by the service.（）

You are creating an application that consumes a Windows Communication Foundation (WCF) service. The service implements the IService contract. The client application contains the CallbackHandler class, which implements IServiceCallback.You need to ensure that a client proxy is created that can communicate with the service over a duplex channel.
Which code segment should you use?（）