如何在C#中读取域名的TXT记录？

using System;
using System.Net;

class Program
{
    static void Main()
    {
        string domain = "example.com";
        string txtRecord = GetTxtRecord(domain);
        Console.WriteLine(txtRecord);
    }

    static string GetTxtRecord(string domain)
    {
        try
        {
            var txtRecords = Dns.GetTxtRecord(domain);
            if (txtRecords.Length > 0)
            {
                return txtRecords[0].ToString();
            }
            else
            {
                return "No TXT record found for the domain.";
            }
        }
        catch (Exception ex)
        {
            return "Error: " + ex.Message;
        }
    }
}