public Form1()
        {
            InitializeComponent();
            ControlClientInfo cl = new ControlClientInfo();

            cl.Dock = DockStyle.Fill;
            this.panel2.Controls.Add(cl);
            ContactBtn.BackColor = SystemColors.Control;
        }
        private void ContactBtn_Click(object sender, EventArgs e)
        {
            RepaintButtons();
            ContactBtn.BackColor = SystemColors.Control;
            this.panel2.Controls.Clear();
            ControlClientInfo cl = new ControlClientInfo();

            cl.Dock = DockStyle.Fill;
            this.panel2.Controls.Add(cl);
        }