// Sends user back to the AddOrder form.
        private void btnBack_Click(object sender, EventArgs e)
        {
            this.Hide();
            frmAddOrder frmAddOrder = new frmAddOrder(admin, this.orderDetails);

            frmAddOrder.Show();
        }
        // Takes the user to the add order form.
        private void button4_Click(object sender, EventArgs e)
        {
            this.Hide();
            frmAddOrder frmAddOrder = new frmAddOrder(admin, new List <OrderDetail>());

            frmAddOrder.Show();
        }