private void SetUpStatusBarOnSelectOrNavigate(int selectedItemsCount) {
spSelItems.Visibility = BooleanToVisibiliy(selectedItemsCount > 0);
sbiSelItemsCount.Visibility = BooleanToVisibiliy(selectedItemsCount > 0);
if (selectedItemsCount == 1)
sbiSelItemsCount.Content = "1 item selected";
else if (selectedItemsCount > 1)
sbiSelItemsCount.Content = selectedItemsCount.ToString() + " items selected";
}