记录C#委托应用1

using System;
using System.Collections.Generic;
using System.Linq;

namespace Commission
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arrInt = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
            //var result = Common.FilterArrayOfInts(arrInt, Application.IsOdd);
            //var result = Common.FilterArrayOfInts(arrInt, delegate (int i) { return (i & 1) == 1; });
            //var result = Common.FilterArrayOfInts(arrInt, i => (i & 1) == 1);
            var result = arrInt.Where(i => (i & 1) == 1);
            foreach (int i in result)
            {
                Console.WriteLine(i);
            }

            Console.ReadLine();
        }
    }

    class Common
    {
        public delegate bool IntFilter(int i);

        public static List<int> FilterArrayOfInts(int[] ints, IntFilter filter)
        {
            List<int> aList = new List<int>();
            foreach (int i in ints)
            {
                if (filter(i))
                {
                    aList.Add(i);
                }
            }
            return aList;
        }
    }

    class Application
    {
        public static bool IsOdd(int i)
        {
            return (i & 1) == 1;
        }

        public static bool IsEven(int i)
        {
            return (i & 1) == 0;
        }
    }
}