C#中使用Ftp一例

FtpWebRequest Request = (FtpWebRequest)WebRequest.Create(Address);
            Request.Method = WebRequestMethods.Ftp.ListDirectory;   //列表  
            Request.Credentials = new NetworkCredential(user, pass);
            FtpWebResponse Response = (FtpWebResponse)Request.GetResponse();
            Stream ResponseStream = Response.GetResponseStream();
            StreamReader Reader = new StreamReader(ResponseStream);
            lstWelcome.Items.Add(Response.BannerMessage);
            lstWelcome.Items.Add(Response.WelcomeMessage);
            while (!Reader.EndOfStream)//读取列表  
            {
                lstFiles.Items.Add(Reader.ReadLine());
            }
            Response.Close();
            ResponseStream.Close();
            Reader.Close();

MSDN参考:

http://msdn.microsoft.com/zh-cn/library/system.net.ftpwebrequest(VS.80).aspx