用C#简单模拟超市收银碰到的问题

Question

class SuperMarket
{
WareHouse CangKu = new WareHouse();
//CangKu.GoodsIn("DreamCar", 100);这么写会报错
public SuperMarket()
{
CangKu.GoodsIn("DreamCar", 100);
CangKu.GoodsIn("Apple", 800);
CangKu.GoodsIn("Book", 997);
CangKu.GoodsIn("Pencil", 68);
}
}

    ——————————————分割线—————————————————
    class WareHouse
{
    List<List<Commodity>> storeroom = new List<List<Commodity>>();
    public WareHouse()
    {
        storeroom.Add(new List<Commodity>());
        storeroom.Add(new List<Commodity>());
        storeroom.Add(new List<Commodity>());
        storeroom.Add(new List<Commodity>());
    }
    public void GoodsIn(string type, int count)
    {
        for (int i = 0; i < count; i++)
        {
            switch (type)
            {
                case "DreamCar": storeroom[0].Add(new DreamCar("DreamCar", 180000, Guid.NewGuid().ToString())); break;
                case "Apple": storeroom[1].Add(new Apple("嘎？果", 3, Guid.NewGuid().ToString())); break;
                case "Book": storeroom[2].Add(new Book("心灵鸭汤读本", 14, Guid.NewGuid().ToString())); break;
                case "Pencil": storeroom[3].Add(new Pencil("小嘴牌铅笔", 0.9, Guid.NewGuid().ToString())); break;
            }
        }
    }
        }   ![图片说明](https://img-ask.csdn.net/upload/201508/30/1440866253_103476.png)

        想简单模拟超市收银，写好WareHouse类，然后在SuperMarket中创建CangKu的时候，想添加商品进去，出现了图示情况。我初学，实在太菜，请大神指导，3Q。

Answer 1

你必须把代码写在方法里，你写在类的定义中了。
不一定写在构造函数，但是一定要写在函数里。