private void ListEdit_Click(object sender, RoutedEventArgs e)
        {
            var           val           = ((Button)sender).Tag;
            AddListWindow addListWindow = new AddListWindow("Edit", (int)val);

            addListWindow.Show();
        }
        private void AddList_Click(object sender, RoutedEventArgs e)
        {
            AddListWindow addListWindow = new AddListWindow("Add", 0);

            addListWindow.Show();
        }