Boxing and Unboxing

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

namespace  Boxing
{
     class  Program
    {
         static   void  Main( string [] args)
        {
             int  count;
            DateTime startTime  =  DateTime.Now;
            ArrayList AyList  =   new  ArrayList();

             //  重复5次测试 
             for  ( int  i  =   5 ; i  >   0 ; i -- )
            {
                AyList.Clear();

                 //  将值类型加入myArrayList数组 
                 for  (count  =   0 ; count  <   5000 ; count ++ )
                {
                    Console.WriteLine( " 开始Boxing..... " );
                     // Boxing
                    AyList.Add(count); 
                }
                
                 //  重新得到值
                 int  j;
                 for  (count  =   0 ; count  <   5000 ; count ++ )
                {
                    Console.WriteLine( " 开始Unboxing.... " );
                     // Unboxing
                    j  =  ( int )AyList[count];
                }
            }

             //  打印结果
            DateTime endTime  =  DateTime.Now;
            Console.WriteLine( " 开始时间: {0} 结束时间: {1} 耗时: {2} " , startTime, endTime, endTime  -  startTime);
            
            Console.WriteLine( " 按回车结束程序... " );
        }
    }
}