private void ListBox_Places_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    ListBox listbox = sender as ListBox;
    if(listbox.SelectedIndex < 0) return;

    // ดึงค่า item ที่ถูกเลือก มาจาก listbox
    Place item = listbox.SelectedItem as Place;

    // เลื่อน pivot ให้กลับไปยังหน้า map
    PivotRoot.SelectedIndex = 0;
    Image_Dest_Icon.Source = new BitmapImage(new Uri(item.image, UriKind.Relative));
    TextBlock_Dest_Name.Text = item.name;
    PushPin_Dest.Location = item.location;

    ApplicationBarIconButton ApplicationBarButton_Direction = ApplicationBar.Buttons[0] as ApplicationBarIconButton;

    // เลื่อน map ให้ครอบคลุมทั้งสองจุด
    if (PushPin_Me.Visibility == System.Windows.Visibility.Visible)
    {
        ApplicationBarButton_Direction.IsEnabled = true;
        Map_Main.ZoomLevel -= 0.5;
        Map_Main.SetView(LocationRect.CreateLocationRect(PushPin_Dest.Location, PushPin_Me.Location));
    }
    else
    {
        Map_Main.Center = PushPin_Dest.Location;
        Map_Main.ZoomLevel = 15;
        ApplicationBarButton_Direction.IsEnabled = false;
    }

    // แสดง pushpin
    PushPin_Dest.Visibility = System.Windows.Visibility.Visible;
    listbox.SelectedIndex = -1;
}