c# Array或List有個很實用的ForEach方法，可以直接傳入一個方法對集合中元素操作

using System;
using System.Collections.Generic;

namespace demo
{
    class Program
    {
        static void Main(string[] args)
        {
            List<String> names = new List<String>();
            names.Add("Bruce");
            names.Add("Alfred");
            names.ForEach(Print);
            names.ForEach(delegate (String name)
            {
                Console.WriteLine(name);
            });
        }
        private static void Print(string s) {
            Console.WriteLine(s);
        }

    }
}