How Do I Upload Multiple Files And Send To Emails Address As An Attachment

foreach (HttpPostedFile postedFile in FileUpload1.PostedFiles)
            {
                if (postedFile != null && postedFile.ContentLength > 0)
                {
                    string filename = Path.GetFileName(postedFile.FileName);
                    string contentType = postedFile.ContentType;
                    int size = FileUpload1.PostedFile.ContentLength;
                    using (Stream fs = postedFile.InputStream)
                    {
                        using (var br = new BinaryReader(fs))
                        {
                            byte[] bytes = br.ReadBytes((Int32) fs.Length);
                            DataAccessLayer.SaveFile(filename, contentType, transNumber, size, bytes);
                            Sendmail(email, filename);
                        }
                    }
                }
               
            }

public void Sendmail(string mailTo, string subject)
    {
        if(FileUpload1.HasFiles)
        {

            try
            {
                var mail = new MailMessage();
                var smtpServer = new SmtpClient("smtp.gmail.com");
                mail.From = new MailAddress("removed", "Interview study material");
                mail.To.Add(mailTo);
                mail.Subject = subject;
                mail.Body = "Please find attachment document!";
                string strFileName =
                    Path.GetFileName(FileUpload1.PostedFile.FileName);
                var attachFile = new Attachment(FileUpload1.PostedFile.InputStream, strFileName);
                mail.Attachments.Add(attachFile);

                smtpServer.Port = 587;
                smtpServer.Credentials = new NetworkCredential("removed", "removed");
                smtpServer.EnableSsl = true;
                smtpServer.Send(mail);

            }
            catch(Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }
    }