static void SendAndReceiveMsg()
        {             
            MessageQueue mq =new MessageQueue();             
            mq.Path = @".\Private$\Demo";          
            //构造消息            
            Message msg =new Message();        
            msg.Body ="Hello MessageQueue";
            //向队列发送消息       
            mq.Send(msg);
            //读取队列中的所有消息         
            Message[] msgs = mq.GetAllMessages();;
            foreach (Message m in msgs)           
            {
                m.Formatter = new System.Messaging.XmlMessageFormatter(new Type[] { typeof(string) });
                Console.WriteLine(m.Body.ToString());
            }
            //清除队列中的所有消息  
            mq.Purge();
        }