private void buttonAdminShowList1_Us_Click(object sender, EventArgs e)
        {
            fRentList fRL = new fRentList();

            fRL.ShowDialog();
            this.Show();
        }
        private void btRentList_Click(object sender, EventArgs e)
        {
            fRentList fRL = new fRentList();

            this.Hide();
            fRL.ShowDialog();
            this.Show();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            fRentList fRL = new fRentList();

            fRL.ShowDialog();
        }