如何使用FTPWebRequest从FTP中删除文件

using System;
using System.Net;

class Program
{
    static void Main()
    {
        string ftpUrl = "ftp://ftp.example.com/path/to/file.txt";
        FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpUrl);
        request.Method = WebRequestMethods.Ftp.DeleteFile;
        request.Credentials = new NetworkCredential("username", "password");

        try
        {
            FtpWebResponse response = (FtpWebResponse)request.GetResponse();
            if (response.StatusCode == FtpStatusCode.FileActionOK)
            {
                Console.WriteLine("文件删除成功。");
            }
            else
            {
                Console.WriteLine("文件删除失败。");
            }
        }
        catch (WebException ex)
        {
            Console.WriteLine("发生错误：{0}", ex.Message);
        }
    }
}