private void UpdateLabel(string tag)
        {
            List <String[]> infos       = world.GenerateInfosElement(Int32.Parse(tag));
            string          textToPrint = "";

            foreach (String[] info in infos)
            {
                textToPrint += info[0] + " : " + info[1] + "\n";
            }
            label1.Text = textToPrint;
        }