private void Purchasing_Selected(object sender, RoutedEventArgs e)
{
transaction purchase = new transaction();
stack.Children.Clear();
stack.Children.Add(purchase);
}
private void close_transaction()
{
transaction purchase = new transaction();
foreach (Window window in Application.Current.Windows)
{
if (window.GetType() == typeof(MainWindow))
{
(window as MainWindow).stack.Children.Clear();
(window as MainWindow).stack.Children.Add(purchase);
}
}
}