奇偶数判断：委托思维

namespace delegateLambda1
{
    class Program
    {
        delegate bool numberChoose(int i);
        static void Main(string[] args)
        {
            List<int> iList = new List<int>(10){1,2,3,4,5,6,7,8,9,10};
            numberChoose nc1 = i => (i % 2 == 1);
            numberChoose nc2 = i => (i % 2 == 0);
            numberChoose nc3 = i => (i % 5 == 0);
            display(iList, nc1);
            display(iList, nc2);
            display(iList, nc3);
            Console.ReadLine();
        }
        static void display(List<int> ilist, numberChoose nc)
        {
            List<int> result = new List<int>();
            foreach (int i in ilist)
            {
                if (nc(i))
                {
                    result.Add(i);
                }
            }
            foreach (int i in result)
            {
                Console.Write(i + "");
            }
            Console.WriteLine();
        }
    }
}

有了他，编程思想要变塞，好OOP