怎么用C#在ftp服务器上建立文件夹

  //创建FTP文件夹 
public Boolean FtpMakeDir(string localFile)//想要创建的文件夹
        {
          //  _Uri是Uri类的路径
            FtpWebRequest req = (FtpWebRequest)WebRequest.Create(_Uri + localFile);
            req.Credentials = new NetworkCredential(UserName, Password);
            req.Method = WebRequestMethods.Ftp.MakeDirectory;
            try
            {
                FtpWebResponse response = (FtpWebResponse)req.GetResponse();
                response.Close();
            }
            catch (Exception)
            {
                req.Abort();
                return false;
            }
            req.Abort();
            return true;
        }

FtpWebRequest.Create(uri);

调用FtpWebRequest类