private void Add_Timer_Click(object sender, RoutedEventArgs e)
        {
            AddTimerWnd add_timer = new AddTimerWnd();

            if (add_timer.ShowDialog() == true)
            {
                date = add_timer.current;
                name = add_timer.nm;
                list.Add(name, date);
                stack.Items.Add(name);
            }
            else
            {
            }
        }
        private void Redact_Click(object sender, RoutedEventArgs e)
        {
            AddTimerWnd add_timer = new AddTimerWnd();

            if (add_timer.ShowDialog() == true)
            {
                date = add_timer.current;
                name = add_timer.nm;
                list.Remove(stack.SelectedValue.ToString());
                stack.Items.Remove(stack.SelectedValue.ToString());
                list.Add(name, date);
                stack.Items.Add(name);
            }
            else
            {
            }
        }