C#.net udp点对点聊天程序(3)

            server.SendTo(b, b.Length, SocketFlags.None, ipep); 
            richTextBox1.AppendText(textBox3.Text + ":\n" + textBox7.Text + "\n"); 
            ena = true; 
byte[] b = Encoding.Default.GetBytes(textBox3.Text + ":\n" + textBox7.Text+"\n");
            server.SendTo(b, b.Length, SocketFlags.None, ipep);
            richTextBox1.AppendText(textBox3.Text + ":\n" + textBox7.Text + "\n");
            ena = true;
服务器开始监听：

[csharp]
//得到本机IP，设置UDP端口号           
ipep2 = new IPEndPoint(IPAddress.Any, int.Parse(textBox9.Text)); 
newsock2 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); 
 
//绑定网络地址  
newsock2.Bind(ipep2); 
 
Thread thread = new Thread(new ThreadStart(serverListen));<span style="white-space:pre">      </span>//监听来自客户端发来的消息  
thread.IsBackground = true; 
thread.Start(); 
                //得到本机IP，设置UDP端口号        
                ipep2 = new IPEndPoint(IPAddress.Any, int.Parse(textBox9.Text));
                newsock2 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

                //绑定网络地址
                newsock2.Bind(ipep2);

                Thread thread = new Thread(new ThreadStart(serverListen));<span style="white-space:pre">  </span>//监听来自客户端发来的消息
                thread.IsBackground = true;
                thread.Start();
服务器监听来自客户端发来的消息：

[csharp]
//得到客户机IP                  
            IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);