private void calculateButton_Click(object sender, RoutedEventArgs e) { Calculator calculator = new Calculator(); bool useDiscount = (discountRadioButton.IsChecked == true); bool termsAreIncluded = (termsIncludedCheckBox.IsChecked == true); bool includeVATCalculations = (calculateVATCheckBox.IsChecked == true); bool vatAlreadyIncluded = (vatAlredyIncludedCheckBox.IsChecked == true); if (includeVATCalculations) { calculator.updateCalculator(amountBox.Text, termsPercentage.Text, vatPercentage.Text, useDiscount, termsAreIncluded, vatAlreadyIncluded); } else { calculator.updateCalculator(amountBox.Text, termsPercentage.Text, useDiscount, termsAreIncluded ); } calculator.updateFigures(); ResultWindow resultWindow = new ResultWindow(calculator); resultWindow.Show(); //this.Close(); }