namespace System.ServiceModel.Channels { public interface IRequestChannel : IChannel, ICommunicationObject { EndpointAddress RemoteAddress { get; } Uri Via { get; } IAsyncResult BeginRequest(Message message, AsyncCallback callback, object state); IAsyncResult BeginRequest(Message message, TimeSpan timeout, AsyncCallback callback, object state); Message EndRequest(IAsyncResult result); Message Request(Message message); Message Request(Message message, TimeSpan timeout); } }