C# 集合类（三）：Stack

Stack：栈，表示对象的简单的后进先出非泛型集合。Push方法入栈，Pop方法出栈。

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Stack sk = new Stack();
            Stack sk2 = new Stack();
            foreach (int i in new int[4] { 1, 2, 3, 4 })
            {
                sk.Push(i);//入栈
                sk2.Push(i);
            }

            foreach (int i in sk)
            {
                Console.WriteLine(i);//遍历
            }

            sk.Pop();//出栈
            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);
            }
        }
    }
}