private void JudulAplikasi_Tapped(object sender, TappedRoutedEventArgs e)
{
HalamanYangAktif.Navigate(typeof(HalamanUtama));
}
private void TombolRiwayat_Tapped(object sender, TappedRoutedEventArgs e)
{
HalamanYangAktif.Navigate(typeof(HalamanRiwayat));
}
public MainPage()
{
this.InitializeComponent();
HalamanYangAktif.Navigate(typeof(CountDownUI));
}