public MainForm()
        {
            InitializeComponent();

            userControls = new UserControl[4];

            userControls[0] = new StringGenerator();
            userControls[1] = new PushDown();
            userControls[2] = new TableGeneration();

            userControls[3] = new UserControl();

            foreach (UserControl userControl in userControls)
            {
                panel.Controls.Add(userControl);
                userControl.Hide();
            }
        }