c# 에서 ftp로 파일 업로드 및 다운로드 하기

이렇게 만들었당 Fileinfo Fileinf는 다이얼로그 박스 열릴때 그 값 가져옴

 private void ssw_image_upload(FileInfo fileinf)
        {
           
            string url = "ftp://" + serverip + fileinf.Name;
            FtpWebRequest reqftp;
            Console.WriteLine("1");
            reqftp = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + serverip + fileinf.Name));
            reqftp.Credentials = new NetworkCredential("cnc", "1111");
            reqftp.KeepAlive = false;
            reqftp.Method = WebRequestMethods.Ftp.UploadFile;
            reqftp.UseBinary = true;
            reqftp.ContentLength = fileinf.Length;
            int bufflen = 2048; // 2kb
            byte[] buff = new byte[bufflen];
            int contentlen;
            FileStream fs = fileinf.OpenRead();
            Stream strm = reqftp.GetRequestStream();
            contentlen = fs.Read(buff, 0, bufflen);
            while (contentlen != 0)
            {
                strm.Write(buff, 0, contentlen);
                contentlen = fs.Read(buff, 0, bufflen);
            }
            strm.Close();
            fs.Close();
        }

        private void ssw_image_download(string img_name)
        {
            WebClient wc = new WebClient();
            wc.Credentials = new NetworkCredential("cnc", "1111");
            wc.DownloadFile("ftp://" + serverip + img_name, "c:/check/"+img_name);
         
        }