private void OnBtnClick(object sender, RoutedEventArgs e)
{
if (tabGroup1.Visibility == Visibility.Visible)
{
tabGroup1.Visibility = Visibility.Collapsed;
tabGroup2.Visibility = Visibility.Collapsed;
// tabGroup3.Visibility = System.Windows.Visibility.Collapsed;
}
else
{
tabGroup1.Visibility = Visibility.Visible;
tabGroup2.Visibility = Visibility.Visible;
//tabGroup3.Visibility = System.Windows.Visibility.Visible;
}
e.Handled = true;
}