c# ช่วยดูโค้ดให้หน่อยคะ มัน error ไม่ทราบว่าเพราะอะไรคะเมือ่ทำการเพิ่ม attachment ใน email

        public static void SendMailAttTo()
        {
            settingDataSetTableAdapters.settingTableAdapter stTb = new WinFormCharpWebCam.settingDataSetTableAdapters.settingTableAdapter();
            settingDataSet.settingDataTable dataTB = stTb.GetData();
            string userID = dataTB.Rows[0]["EmailFrom"].ToString();
            string password = dataTB.Rows[0]["EmailPass"].ToString();
            string smtpServer = "smtp.gmail.com";
            int smtpPort = 587;

            MailAddress mailTo = new MailAddress(dataTB.Rows[0]["EmailTo"].ToString());
            MailAddress mailFrom = new MailAddress(userID);

            MailMessage message = new MailMessage(mailFrom, mailTo);
            message.IsBodyHtml = true;
            Attachment attachfile = new Attachment("c:\\PicEnhance_2.bmp");
            message.Attachments.Add(attachfile);
            Attachment attachfile1 = new Attachment("c:\\PicEnhance_1.bmp");
            message.Attachments.Add(attachfile1);
            message.Subject = dataTB.Rows[0]["EmailSubject"].ToString(); 
            message.Body = dataTB.Rows[0]["EmailMsgs"].ToString(); 

            SmtpClient client = new SmtpClient(smtpServer, smtpPort);
            client.EnableSsl = true;
            client.UseDefaultCredentials = false;
            client.Credentials = new System.Net.NetworkCredential(userID, password);
            client.Credentials = new System.Net.NetworkCredential(userID, password);

            try
            {
                client.Send(message);
                MessageBox.Show(string.Format("sent to: {0} complete.", dataTB.Rows[0]["EmailTo"].ToString()));
                
            }
            catch (Exception ex)
            {
                MessageBox.Show(string.Format("Error {0}", ex.Message));
            }
       }

        private void timer1_Tick(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            imgCapture.Image = imgVideo.Image;
            SaveCap.SaveImageCapture(imgCapture.Image);
            Bitmap img = new Bitmap(imgCapture.Image);
            AddFilter(img, "PicEnhance_1.bmp");
            FileStream fs = new FileStream("C:\\Picture_1.bmp", FileMode.Open);
            imgShow1.Image = Image.FromStream(fs);
            fs.Close();
            timer2.Enabled = true;
        }

        private void AddFilter(Bitmap image, string fileName)
        {
            //Filter_GrayScale(image);
            image.Save("C:\\" + fileName);
            image.Dispose();
        }