单选题A Windows Communication Foundation (WCF) service sends notifications when the service is started and stopped.You need to implement a client that logs these notifications. Which class should you use?（）AAnnouncementServiceBAnnouncementClientCDiscoveryClientDHttpListener
单选题
A Windows Communication Foundation (WCF) service sends notifications when the service is started and stopped.You need to implement a client that logs these notifications. Which class should you use?（）
A
AnnouncementService
B
AnnouncementClient
C
DiscoveryClient
D
HttpListener
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