编辑“︁C Sharp 网络编程概述”︁（章节）

=== UDP示例：简单数据报通信 ===

<syntaxhighlight lang="csharp">
// UDP发送端
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

class UDPSender
{
    static void Main()
    {
        UdpClient sender = new UdpClient();
        IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8081);

        string message = "UDP测试消息";
        byte[] data = Encoding.ASCII.GetBytes(message);
        sender.Send(data, data.Length, endPoint);
        Console.WriteLine($"已发送UDP消息: {message}");

        sender.Close();
    }
}
</syntaxhighlight>

<syntaxhighlight lang="csharp">
// UDP接收端
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

class UDPReceiver
{
    static void Main()
    {
        UdpClient receiver = new UdpClient(8081);
        IPEndPoint endPoint = new IPEndPoint(IPAddress.Any, 0);

        byte[] data = receiver.Receive(ref endPoint);
        string message = Encoding.ASCII.GetString(data);
        Console.WriteLine($"收到来自 {endPoint} 的消息: {message}");

        receiver.Close();
    }
}
</syntaxhighlight>