WCF技术内幕 第6章(4)

请求/应答通道：IRequestChannel和IReplyChannel

在请求/应答消息交换模式里，消息的参与者都要发送和接收消息。发送者发送消息给接收者，然后等待回复；接收者接收请求消息，然后发送一个回复消息。

    public abstract class RequestContext : IDisposable    {        [TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]        protected RequestContext();        public abstract Message RequestMessage { get; }        public abstract void Abort();        public abstract IAsyncResult BeginReply(Message message, AsyncCallback callback, object state);        public abstract IAsyncResult BeginReply(Message message, TimeSpan timeout, AsyncCallback callback, object state);        public abstract void Close();        public abstract void Close(TimeSpan timeout);        protected virtual void Dispose(bool disposing);        public abstract void EndReply(IAsyncResult result);        public abstract void Reply(Message message);        public abstract void Reply(Message message, TimeSpan timeout);    }