private void Button_Click_1(object sender, RoutedEventArgs e)
{
MainWindow main = new MainWindow();
SalePage sale = new SalePage();
main.ShowDialog();
}
private void BtnClear_Click(object sender, RoutedEventArgs e)
{
tenderedAmount.Text = "";
changeLabel.Content = "r...";
totalLabel.Content = "r...";
invoiceGrid.ItemsSource = null;
SalePage salePage = new SalePage();
salePage._contentLoaded = false;
}
