private void button1_Click(object sender, EventArgs e)

        {

            try            

            {                 

                int port = 2000;                

                string host = "192.168.0.127";                

                IPAddress ip = IPAddress.Parse(host);                

                IPEndPoint ipe = new IPEndPoint(ip, port);//把ip和端口转化为IPEndPoint实例  



                c = null;

                c = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个Socket

                              

                c.Connect(ipe);//连接到服务器  

            }           

            catch (ArgumentNullException a)

            {

                MessageBox.Show(String.Format("ArgumentNullException:{0}", a));

            }            

            catch (SocketException a)

            {

                MessageBox.Show(String.Format("SocketException:{0}", a.Message));

            }

        }

private void button2_Click(object sender, EventArgs e)

        {

            string sendStr = "hello!This is a socket test";

            byte[] bs = Encoding.ASCII.GetBytes(sendStr);

            

            c.Send(bs, bs.Length,