单项选择题
A. Replace line 01 with the following code [ServiceContract(SessionMode = SessionMode.NotAllowed)]
B. Replace line 01 with the following code [ServiceContract(SessionMode = SessionMode.Required)]
C. Call the Invoke method of the form and supply a delegate.
D. Call the BeginInvoke method of the form and supply a delegate.
单项选择题 You develop a Windows Communication Foundation (WCF) service. You enable all performance counters and run multiple calls to the service.The service must isolate session data to each user. You need to monitor the instancing behaviour used in the service. Which performance counter should you monitor?（）
单项选择题 You create a Windows Communication Foundation (WCF) service and deploy it with wsHttpBinding and message security enabled.You create an intermediate WCF service for logging messages sent to the primary service.The intermediate service is called via endpoint behaviour. The primary service is receiving malformed data from a client application.You need to enable inspection of the malformed data and prevent message tampering. What do you do?（）
单项选择题 You are hosting a Windows Communication Foundation (WCF) service at http://www.contoso.com for a law enforcement agency.The agency adds operations to support sending biometric fingerprint data via non-buffered streaming.The service data is routed between intermediaries. The WCF binding you are using by default does not support encryption.You need to ensure that the fingerprint data is not disclosed when passed over the network. What should you do?（）