Stack

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;

namespace Stack
{
    class Program
    {
        static void Main(string[] args)
        {
            Stack<int> sk = new Stack<int>();
            Stack<int> sk2 = new Stack<int>();
            foreach (int i in new int[4] { 1, 2, 3, 4 })
            {
                sk.Push(i);
                sk2.Push(i);
            }
            foreach (int i in sk)
            {
                Console.WriteLine(i);
            }
            sk.Pop();
            Console.WriteLine("Pop");
            foreach (int i in sk)
            {
                Console.WriteLine(i);

            }
            sk2.Peek();//弹出最后一项不删除
            Console.WriteLine("Peek");
            foreach (int i in sk2)
            {
                Console.WriteLine(i);
                Console.ReadLine();
            }
        }
    }
}

运行结果为：
4
3
2
1
Pop
3
2
1
Peek
4
3
2
1

(此文为转载)