private void button_Click(object sender, RoutedEventArgs e)
{
frame.Content = null; //menghapus konten di frame
frame.NavigationService.RemoveBackEntry(); //menghapus history frame
//memanggil menubeli
MenuBeli kmenubeli = new MenuBeli();
frame.Content = kmenubeli;//dimasukan ke dalam frame
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
MenuBeli kmenubeli = new MenuBeli();
frame.Content = kmenubeli;
}