编辑“︁C Sharp 网络服务发现”︁（章节）

=== UDP广播实现 ===
通过UDP广播实现简单的服务发现，适用于同子网内的设备通信。

<syntaxhighlight lang="csharp">
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

// 服务端：监听并响应发现请求
public class DiscoveryServer {
    private const int Port = 9999;
    public static void Start() {
        UdpClient udpServer = new UdpClient(Port);
        IPEndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
        
        while (true) {
            byte[] data = udpServer.Receive(ref remoteEP);
            string request = Encoding.ASCII.GetString(data);
            if (request == "DISCOVER") {
                byte[] response = Encoding.ASCII.GetBytes("SERVICE:MyCSharpApp");
                udpServer.Send(response, response.Length, remoteEP);
            }
        }
    }
}

// 客户端：发送发现请求
public class DiscoveryClient {
    private const int Port = 9999;
    public static void Discover() {
        UdpClient udpClient = new UdpClient();
        IPEndPoint serverEP = new IPEndPoint(IPAddress.Broadcast, Port);
        
        byte[] request = Encoding.ASCII.GetBytes("DISCOVER");
        udpClient.Send(request, request.Length, serverEP);
        
        byte[] response = udpClient.Receive(ref serverEP);
        Console.WriteLine($"发现服务: {Encoding.ASCII.GetString(response)}");
    }
}
</syntaxhighlight>

'''输入/输出示例：'''
<pre>
客户端输出: 发现服务: SERVICE:MyCSharpApp
</pre>