private void ActualizarToolStripMenuItem_Click(object sender, EventArgs e)
        {
            F_Actualizar fa = new F_Actualizar();

            fa.FormClosed += (s, args) => this.Close();
            fa.Show();
            this.Hide();
        }
        private void Button1_Click(object sender, EventArgs e)
        {
            F_Actualizar fa = new F_Actualizar();

            fa.FormClosed += (s, args) => this.Show();
            fa.Show();
            this.Hide();
        }