send email at a scheduled time and date in Asp.net

void Application_Start(object sender, EventArgs e)
    {
        System.Timers.Timer myTimer = new System.Timers.Timer();
        myTimer.Interval =60000; //3600000;
        myTimer.AutoReset = true;
        myTimer.Elapsed += new ElapsedEventHandler(myTimer_Elapsed);
        myTimer.Enabled = true;
    }

    public void myTimer_Elapsed(object source, System.Timers.ElapsedEventArgs e)
    {
        // Object initialization of data link library
        ScheduleMailandSMS _ScheduleMailandSMS = new ScheduleMailandSMS();        
        DataTable dttemppayinslip = GetData_PayinslipSendsmmail();
        foreach (DataRow dr in dttemppayinslip.Rows)
{
        _ScheduleMailandSMS.SendOrderDetailsMail("", "");
    }
}
//Global file events End

//Mail send function Start
public void SendOrderDetailsMail(string bodystr, string AMEmailID)
    {
        DataTable dtemailsetting = _objemailsetting.GetEmailSettingAll();
        if (dtemailsetting.Rows.Count > 0)
        {
            MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient(dtemailsetting.Rows[0]["SmtpHost"].ToString());

            mail.From = new MailAddress(dtemailsetting.Rows[0]["AdminEmail_registeruser"].ToString());
            mail.To.Add("pramod,joshi@abc.com");
            mail.Subject = "test mail ";
            mail.Body = bodystr;
            SmtpServer.Port = Convert.ToInt16(dtemailsetting.Rows[0]["SMTPPort"]);
            SmtpServer.Credentials = new System.Net.NetworkCredential(dtemailsetting.Rows[0]["SMTPEmail"].ToString(), dtemailsetting.Rows[0]["SMTPPassword"].ToString());
            SmtpServer.EnableSsl = false;
            mail.IsBodyHtml = true;
            SmtpServer.Send(mail);
        }
        else
        {

        }
    }