static void Main(string[] args)
        {
            try
            {
                int port = 2000;
                string host = "127.0.0.1";
                IPAddress ip = IPAddress.Parse(host);
                IPEndPoint ipe = new IPEndPoint(ip, port);
                Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个Socket类
                s.Bind(ipe);//绑定2000端口
                s.Listen(0);//开始监听
                Console.WriteLine("等待连接");
                Socket temp = s.Accept();//为新建连接创建新的Socket。
                Console.WriteLine("获取新连接");
                string recvStr = "";
                byte[] recvBytes = new byte[1024];
                int bytes;
                bytes = temp.Receive(recvBytes, recvBytes.Length, 0);//从客户端接受信息
                recvStr += Encoding.UTF8.GetString(recvBytes, 0, bytes);
                Console.WriteLine("服务器接受信息:{0}", recvStr);//把客户端传来的信息显示出来
                string sendStr = "服务器发送信息成功!";
                byte[] bs = Encoding.UTF8.GetBytes(sendStr);
                temp.Send(bs, bs.Length, 0);//返回客户端成功信息
                temp.Close();
                s.Close();
            }
            catch (ArgumentNullException e)
            {
                Console.WriteLine("参数异常: {0}", e);
            }
            catch (SocketException e)
            {
                Console.WriteLine("套接字异常: {0}", e);
            }
            Console.WriteLine("按回车键退出");
            Console.ReadLine();
        }

try
            {
                int port = 2000;
                string host = "192.168.3.141";
                IPAddress ip = IPAddress.Parse(host);
                IPEndPoint ipe = new IPEndPoint(ip, port);//把ip和端口转化为IPEndPoint实例
                Socket c = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个Socket
                result.Text = "正在连接......";
                c.Connect(ipe);//连接到服务器
                string sendStr = "这是测试信息！";
                byte[] bs = Encoding.UTF8.GetBytes(sendStr);
                result.Text = "发送测试消息";
                c.Send(bs, bs.Length, 0);//发送测试信息
                string recvStr = "";
                byte[] recvBytes = new byte[1024];
                int bytes;
                bytes = c.Receive(recvBytes, recvBytes.Length, 0);//从服务器端接受返回信息
                recvStr += Encoding.UTF8.GetString(recvBytes, 0, bytes);
                //Console.WriteLine("Client Get Message:{0}", recvStr);//显示服务器返回信息
                result.Text = "客户端接受信息：" + recvStr;
                c.Close();
            }
            catch (ArgumentNullException ae)
            {
                Console.WriteLine("参数异常: {0}", ae);
            }
            catch (SocketException se)
            {
                Console.WriteLine("套接字异常: {0}", se);
            }
        }