FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create("ftp://ftp.yoursite.com/wwwroot/TestFile.txt");
            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential("usename", "password");

            Stream ftpStream = request.GetRequestStream();
            FileStream fs = File.OpenRead(path + "\\TestFile.txt");
            int length = 1024;
            byte[] buffer = new byte[length];
            int bytRead = 0;

            do
            {
                bytRead = fs.Read(buffer, 0, length);
                ftpStream.Write(buffer, 0, bytRead);
            }
            while (bytRead != 0);

            fs.Close();
            ftpStream.Close();