private void ButBasket_Click(UnidaysDiscountChallenge unidaysDiscountChallenge)
        {
            //Create a new window
            BasketWindow basketWindow = new BasketWindow(unidaysDiscountChallenge);

            basketWindow.Show();

            Close();
        }
        private void ButBasket_Click(UnidaysDiscountChallenge unidaysDiscountChallenge)
        {
            //Create a new window, send in the basket
            BasketWindow basketWindow = new BasketWindow(unidaysDiscountChallenge);

            if (basketWindow.ShowDialog() == true)
            {
                tbBasketSize.Text = unidaysDiscountChallenge.GetBasketSize().ToString();
            }
        }