C#使用struct类型作为泛型Dictionary<TKey,TValue>的键

    public struct GoodsKey
    {
        private int _no;
        private int _size;

        public GoodsKey(int no, int size)
        {
            _no = no;
            _size = size;
        }

        public class EqualityComparer : IEqualityComparer<GoodsKey>
        {

            public bool Equals(GoodsKey x, GoodsKey y)
            {
                return x._no == y._no && x._size == y._size;
            }

            public int GetHashCode(GoodsKey obj)
            {
                return obj._no ^ obj._size;
            }
        }
    }

    public class Goods
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<GoodsKey, Goods> list = new Dictionary<GoodsKey, Goods>(new GoodsKey.EqualityComparer());
            GoodsKey key1 =new GoodsKey(1, 100);
            list.Add(key1,new Goods(){Id = 1, Name = "手表"});
            if (list.ContainsKey(key1))
            {
                Console.WriteLine("此柜已经本占用~~");
            }
            else
            {
                Console.WriteLine("此柜目前是空的~~");
            }
            Console.ReadKey();
        }
    }