private void Textitem_MouseUp(object sender, MouseButtonEventArgs e)
        {
            var send = (TextBlock)((ListBoxItem)sender).Content;

            var el = Preambula.First(w => w.Item1 == SplitProperties(send.Text).Item1);

            var temp = SplitProperties(send.Text);
            Hider.Visibility = Visibility.Visible;
            var m = new Mark(temp.Item1, temp.Item2);
            m.ShowDialog();

            Hider.Visibility = Visibility.Hidden;
            Preambula = Preambula.Where(w => w.Item1 != el.Item1).ToList();
            Preambula.Add(new Tuple<string, string>(m.name, m.value));
            UpdateRemarks();
        }
 private void Button_Click_9(object sender, RoutedEventArgs e)
 {
     var m = new Mark("название", "значение");
     m.ShowDialog();
     Preambula.Add(new Tuple<string, string>(m.name, m.value));
     UpdateRemarks();
 }