使用C#注册MDNS服务

using System;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.Text;

public class MDNSServiceRegistration
{
    private const int MDNS_PORT = 5353;
    private const string MDNS_MULTICAST_ADDRESS = "224.0.0.251";

    public static void Main()
    {
        // 创建UDP套接字实例
        UdpClient udpClient = new UdpClient();

        // 设置套接字属性
        udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
        udpClient.ExclusiveAddressUse = false;

        // 加入MDNS多播组
        IPAddress multicastAddress = IPAddress.Parse(MDNS_MULTICAST_ADDRESS);
        udpClient.JoinMulticastGroup(multicastAddress);

        // 构造MDNS消息
        string serviceName = "MyService";
        string serviceType = "_http._tcp";
        int servicePort = 8080;
        string mdnsMessage = string.Format("{0}._{1}.{2}:{3}", serviceName, serviceType, Environment.MachineName, servicePort);

        // 发送MDNS消息
        byte[] mdnsBytes = Encoding.ASCII.GetBytes(mdnsMessage);
        udpClient.Send(mdnsBytes, mdnsBytes.Length, new IPEndPoint(multicastAddress, MDNS_PORT));

        // 关闭套接字
        udpClient.Close();

        Console.WriteLine("MDNS service registration completed.");
    }
}