WCF service Contract

Question

hi,

please could anyone provide the correct answer for the question. 

 

If "IService1" is a contract,

public interface IService1

{

   [operationContract] 

   string GetData(int value); 

} then at the client side followoing is the piece of code to obtin the proxyObject, to call the service .

string url = "htt://localhost:26800/service1.svc?wsdl";

EndPointAddress endPoint = new EndPointAddress (url); 

BasicHttpBinding binding = new  BasicHttpBinding(); 

----------------------------------------------------------------------------------

 Console.WriteLine (ref, GetData(100)) ;

 

Options : 

 

1. IService1 lref = new ChannelFactory <IService1> (endPoint), CreateChannel(); 

2. IService1 lref = new ChannelFactory <IService1> (binding, endPoint), CreateChannel();

3. IService1 lref = new ChannelFactory <IService1> (binding), CreateChannel(); 

4.  IService1 lref = new ChannelFactory <IService1> (), CreateChannel();