//private void CISAirways_Load(object sender, EventArgs e)
        //{
        //    DateLabel.Text = DateTime.Today.ToString("MM/dd/yyyy");

        //    AdultTicketCount.Focus();
        //}

        private void ResetBttn_Click(object sender, EventArgs e)
        {
            AdultTicketCount.Text    = "0";
            TeenTicketCount.Text     = "0";
            ChildrenTicketCount.Text = "0";

            AAABox.Checked      = false;
            SamsClubBox.Checked = false;
            WeekendBox.Checked  = false;

            FirstClassBttn.Checked = true;

            //FirstClassAdult.Text = "$500.00";
            //FirstClassTeen.Text = "$325.00";
            //FirstClassChild.Text = "$175.00";

            //CoachAdult.Text = "$375.00";
            //CoachTeen.Text = "$280.00";
            //CoachChild.Text = "$80.00";

            TotalTicketCount.Text  = "0";
            Pre_discountCost.Text  = "$0.00";
            Post_discountCost.Text = "$0.00";

            TotalCost = 0;

            DateLabel.Text = DateTime.Today.ToString("MM/dd/yyyy");

            AdultTicketCount.Focus();
            AdultTicketCount.SelectAll();
        }
        private void CalculateBttn_Click(object sender, EventArgs e)
        {
            int ATicketCount = 0;
            int TTicketCount = 0;
            int CTicketCount = 0;


            if (!int.TryParse(AdultTicketCount.Text, out ATicketCount))
            {
                MessageBox.Show("Be sure Adult ticket count is a valid interger number.", "Data entry error...",
                                MessageBoxButtons.OK, MessageBoxIcon.Error);
                AdultTicketCount.Focus();
                AdultTicketCount.SelectAll();
                return;
            }

            if (!int.TryParse(TeenTicketCount.Text, out TTicketCount))
            {
                MessageBox.Show("Be sure Teen ticket count is a valid interger number.", "Data entry error...",
                                MessageBoxButtons.OK, MessageBoxIcon.Error);
                TeenTicketCount.Focus();
                TeenTicketCount.SelectAll();
                return;
            }

            if (!int.TryParse(ChildrenTicketCount.Text, out CTicketCount))
            {
                MessageBox.Show("Be sure Child ticket count is a valid interger number.", "Data entry error...",
                                MessageBoxButtons.OK, MessageBoxIcon.Error);
                ChildrenTicketCount.Focus();
                ChildrenTicketCount.SelectAll();
                return;
            }

            decimal Discount = 0;

            TotalTicketCount.Text = (ATicketCount + TTicketCount + CTicketCount).ToString();

            TotalCost = ((AdultTicketCost * ATicketCount) + (TeenTicketCost * TTicketCount) + (ChildrenTicketCost * CTicketCount));

            Pre_discountCost.Text = TotalCost.ToString("c");

            if (AAABox.Checked == true)
            {
                Discount += .10m;
            }

            if (SamsClubBox.Checked == true)
            {
                Discount += 0.12m;
            }

            if (WeekendBox.Checked == true)
            {
                Discount += 0.20m;
            }

            TotalCost -= (TotalCost * Discount);
            TotalCost += (TotalCost * TaxRate);

            Post_discountCost.Text = TotalCost.ToString("c");
        }