如何在C#中使用FTP列出目录内容？

using System;
using System.Net;

class Program
{
    static void Main(string[] args)
    {
        string ftpUrl = "ftp://example.com/";
        string ftpUsername = "username";
        string ftpPassword = "password";

        FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpUrl);
        request.Method = WebRequestMethods.Ftp.ListDirectory;
        request.Credentials = new NetworkCredential(ftpUsername, ftpPassword);

        FtpWebResponse response = (FtpWebResponse)request.GetResponse();
        Console.WriteLine("Directory List:");
        Console.WriteLine();

        using (var reader = new System.IO.StreamReader(response.GetResponseStream()))
        {
            while (!reader.EndOfStream)
            {
                string fileName = reader.ReadLine();
                Console.WriteLine(fileName);
            }
        }

        response.Close();
    }
}