Create quotation in pdf at the time of saving and the mail it in simple way.
You can send mail like this
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress(txtFromEmailID.Text);
mail.To.Add(txtTOEmailID.Text);
mail.Subject = txtSubject.Text;
mail.Attachments.Add(new Attachment("path of your pdf file"));
SmtpServer.Port = 587;
SmtpServer.Credentials = new System.Net.NetworkCredential(txtFromEmailID.Text,txtPassword.Text);
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail);
hope this help you