单项选择题
A. tcp Transport, windows Stream Security, transaction Flow, binary Message Encoding
B. transaction Flow, binary Message Encoding, windows Stream Security, tcp Transport
C. windows Stream Security, tcp Transport, binary Message Encoding, transaction Flow
D. binary Message Encoding, transaction Flow, tcp Transport, windows Stream Security
单项选择题 A Windows Communication Foundation (WCF) service has a callback contract. You are developing a client application that will call this service.You must ensure that the client application can interact with the WCF service. What should you do?（）
单项选择题 You are working with a Windows Communication Foundation (WCF) client application that has a generated proxy named SampleServiceProxy.When the client application is executing, in line 04 of the following code, the channel faults (Line numbers are included for reference only.) 01 SampleServiceProxy proxy = new SampleServiceProxy(); 02 try 03 { 04 proxy.ProcessInvoice(invoice); 05 } 06 catch 07 { 08 if(proxy.State == CommunicationState.Faulted) 09 { 10 ... 11 } 12 } 13 proxy.UpdateCustomer(customer);You need to return proxy to a state in which it can successfully execute the call in line 13.Which code segment should you use at line 10?（）
单项选择题 You are building a client for a Windows Communication Foundation (WCF) service. You need to create a proxy to consume this service. Which class should you use?（）