public string AskToBuyProduct(Player player, Store store) { player.ShowInventory(); Console.WriteLine("\r\nIs There Anything You'd Like To Buy?"); string userAnswer = Console.ReadLine().ToLower().Trim(); switch (userAnswer) { case "yes": store.BuyProduct(player); return("yes"); case "no": return("no"); default: AskToBuyProduct(player, store); return("yes"); } }