private void btnDeno_Click(object sender, EventArgs e)
        {
            var cashAndCheckBreakDown = new CashAndCheckBreakDown();
            var denomination          = new CashAndCheckBreakdownWindow(cashAndCheckBreakDown);

            if (denomination.ShowDialog() == true)
            {
                _denomonation = cashAndCheckBreakDown;
            }
        }
        private void btnDenomination_Click(object sender, RoutedEventArgs e)
        {
            var cashAndCheckBreakDown = new CashAndCheckBreakDown();

            cashAndCheckBreakDown.Copy(_modelTellerCollector.CashAndCheckDenomimation);

            var denomination = new CashAndCheckBreakdownWindow(cashAndCheckBreakDown);

            denomination.IsReadOnly = !CanModify;
            if (denomination.ShowDialog() == true)
            {
                _modelTellerCollector.CashAndCheckDenomimation = cashAndCheckBreakDown;
            }
        }