namespace System.ServiceModel.Routing
{
    [ServiceContract(CallbackContract = typeof(IDuplexRouterCallback), Namespace = "http://schemas.microsoft.com/netfx/2009/05/routing", SessionMode = SessionMode.Required)]
    public interface IDuplexSessionRouter
    {
        [OperationContract(Action = "*", AsyncPattern = true, IsOneWay = true)]
        IAsyncResult BeginProcessMessage(Message message, AsyncCallback callback, object state);
    }
}