C#中Udp通信问题

Question

我在C#中，用Udp实现网络通信，用计算机向一个端口发消息后，如果想从接受消息方再消息发回来，还需要什么链接吗？下面是我写的代码，有点问题，希望大家帮我改一下！窗体就是上面一个richtextbox1,下面一个richtextbox2,最下面一个接收按钮btnReceive，一个发送按钮btnSend。两个窗体结构是一样的！麻烦大家了！
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Threading;namespace 个人
{
    public partial class 个人 : Form
    {
        UdpClient udpClient;
        Thread thread;        public 个人()
        {
            InitializeComponent();
            CheckForIllegalCrossThreadCalls = false;
            udpClient = new UdpClient(13579);
        }        private void listen()
        {
            IPEndPoint iep = null;
            while (true)
            {
                string sData = System.Text.Encoding.UTF8.GetString
                    (udpClient.Receive(ref iep));
                this.richTextBox1.Text += sData;
            }
        }        private void btnSend_Click(object sender, EventArgs e)
        {
            richTextBox1.Text += richTextBox2.Text;
            string temp = this.richTextBox2.Text;
            byte[] bData = System.Text.Encoding.UTF8.GetBytes(temp);
            udpClient.Connect(IPAddress.Parse("127.0.0.1"), 13579);
            udpClient.Send(bData, bData.Length); 
            richTextBox2.Text = null;
            richTextBox2.Focus();
        }        private void btnReceive_Click(object sender, EventArgs e)
        {
            btnReceive.Enabled = false;
            thread = new Thread(new ThreadStart(listen));
            thread.IsBackground = true;
            thread.Start();
        }        private void 个人_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (thread != null)
                thread.Abort();
        }
    }
}
------------------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Threading;namespace Udp聊天
{
    public partial class 群 : Form
    {
        UdpClient udpClient;
        Thread thread;        public 群()
        {
            udpClient = new UdpClient();
            InitializeComponent();
            CheckForIllegalCrossThreadCalls = false;
            //udpClient = new UdpClient(13579);
        }        private void btnSend_Click(object sender, EventArgs e)
        {
            richTextBox1.Text += '\n'+this.richTextBox2.Text;
            string temp = this.richTextBox2.Text;
            byte[] bData = System.Text.Encoding.UTF8.GetBytes(temp);
            udpClient.Connect(IPAddress.Parse("127.0.0.1"), 13579);
            udpClient.Send(bData, bData.Length);
            richTextBox2.Text = null;
            richTextBox2.Focus();
        }        private void btnReceive_Click(object sender, EventArgs e)
        {
            btnReceive.Enabled = false;
            thread = new Thread(new ThreadStart(listen));
            thread.IsBackground = true;
            thread.Start();
        }        private void 群_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (thread != null)
                thread.Abort();
        }        private void listen()
        {
            IPEndPoint iep = null;
            while (true)
            {
                string sData = System.Text.Encoding.UTF8.GetString
                    (udpClient.Receive(ref iep));
                this.richTextBox1.Text += sData;
            }
        }
    }
}

Answer 1

udp比较好能了找点示例看了。和VC++的一样，但是哟写的和QQ一样成熟的东西就不容易了
写程序本身就是技巧属于低档技术；设计才是高级的王道。