private void button1_Click_2(object sender, EventArgs e)
        {
            Frm_MenuPrincipal menuPrincipal = new Frm_MenuPrincipal();

            this.Hide();
            menuPrincipal.Show();
        }
        private void btnSalirApp_Click(object sender, EventArgs e)
        {
            Frm_MenuPrincipal frm_MenuPrincipal = new Frm_MenuPrincipal();

            frm_MenuPrincipal.Show();
            this.Hide();
        }