byte[] userbytes = System.Text.Encoding.UTF8.GetBytes(v);

            socket = new System.Net.Sockets.Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            SocketAsyncEventArgs socketArgs = new SocketAsyncEventArgs();
            socketArgs.RemoteEndPoint = new DnsEndPoint("15.15.0.10", 6003);
            //socketArgs.RemoteEndPoint = new DnsEndPoint("15.15.0.10", 6003
//);
            //将需要发送的内容转为byte[]，保存到UserToken属性中
            socketArgs.UserToken = userbytes;
            socketArgs.Completed += new EventHandler<SocketAsyncEventArgs>(socketArgs_Completed);
            //客户端步骤一：发起服务器连接请求。
            socket.ConnectAsync(socketArgs);


void socketArgs_Completed(object sender, SocketAsyncEventArgs e)
        {
            if (e.LastOperation == SocketAsyncOperation.Connect)
            {
               
                //客户端步骤二：连接服务器成功，将需要发送的数据放入缓冲区中，然后异步向服务器发送消息请求
                byte[] userbytes = (byte[])e.UserToken;
                e.SetBuffer(userbytes, 0, userbytes.Length);
                socket.SendAsync(e);
            }
            else if (e.LastOperation == SocketAsyncOperation.Send)
            {
                //客户端步骤三：消息发送成功，此时设置一个新的缓冲区实例，并且发起异步接收服务器返回的消息
                byte[] userbytes = new byte[1024*1024];
                e.SetBuffer(userbytes, 0, userbytes.Length);
                socket.ReceiveAsync(e);
            }
            else if (e.LastOperation == SocketAsyncOperation.Receive)
            {
                //客户端步骤四：获取到服务器返回的消息，关闭Socket
                string RecevieStr = Encoding.UTF8.GetString(e.Buffer, 0, 
                      e.Buffer.Length).Replace("\0", "");
                
                //因为是异步Socket请求，所以需要使用UI线程更新的显示效果
               this.dgdPerformance.Dispatcher.BeginInvoke(new DoThingDele(DoThing),RecevieStr);
               // socket.Close();
            }
        }