private void submitButton_Click(object sender, EventArgs e) { try { if (_salesList.Count > 0) { _sales.CustomerId = _customerId; _sales.GrandTotal = _grandTotal; _sales.Discount = _discountPercent; _sales.DiscountAmount = _discountAmount; _sales.PayableAmount = _payableAmount; foreach (Sales sales in _salesList) { _salesManager.DecreaseProductQuantity(sales); } Add(_sales); //ResetAll(); confirmationLabel.Text = "Sales complete for Customer: " + _sales.Customer; } } catch (Exception error) { ExceptionMessage(error); } }