private void admLoginSucess(object sender, RoutedEventArgs e)
        {
            admin_screen_loggedin obj = new admin_screen_loggedin();

            this.Visibility = Visibility.Hidden;
            obj.Show();
        }
        private void backAdmScreen(object sender, RoutedEventArgs e)
        {
            admin_screen_loggedin obj = new admin_screen_loggedin();

            this.Visibility = Visibility.Hidden;
            obj.Show();
        }