单项选择题
A. Catch and handle both TimeoutFaultException and FaultException.
B. Catch both TimeoutFaultException and FaultException. Create a new channel in both cases.
C. Catch and handle TimeoutFaultException. Catch FaultException and create a new channel.
D. Catch and handle FaultException. Catch TimeoutFaultException and create a new channel.
单项选择题 A Windows Communication Foundation (WCF) solution exposes the following contract over an HTTP connection.[ServiceContract]public interface IDataService{ [OperationContract] string GetData();}Existing clients are making blocking calls to GetData. Calls to GetData take five seconds to complete.You need to allow new clients to issue non-blocking calls to get the data, without breaking any existing clients. What should you do?（）
单项选择题 You are creating a Windows Communication Foundation (WCF) service. You have the following requirements: Messages must be sent over TCP The service must support transactions. Messages must be encoded using a binary encoding Messages must be secured using Windows stream-based security.You need to implement a custom binding for the service. In which order should the binding stack be configured?（）
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?（）