C# 装箱和拆箱操作

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

namespace _3.装箱和拆箱
{
    class Program
    {
        static void Main（string[] args）
        {
            //------------------------------------------------
            //实际开发中应该尽量减少不必要的装箱和拆箱 因为两者存储方式不同
            //转换时会造成性能的损失和精度的损失
            //-------------------------------------------------
            //值类型 --->引用类型  装箱
            //引用类型 --->值类型  拆箱
            //java中数据类型转换
            //1.自动类型提升（转换） --- 装箱
            //double d = 1; --->  d = 1.0;
            //2.强制类型转换  ---  拆箱
            //double  + int = int
            //（int）double + int = int
            
            //自动装箱
            object o = 1;
            int score = （int）o + 1;

            //员工类  PM   经理类 EM
            
        }
    }
}

 属性            大小     日期    时间   名称
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     文件       2456  2014-10-27 14:19  3.装箱和拆箱\3.装箱和拆箱\3.装箱和拆箱.csproj

     文件      11600  2014-10-27 14:19  3.装箱和拆箱\3.装箱和拆箱\bin\Debug\3.装箱和拆箱.vshost.exe

     文件       5941  2014-10-27 14:19  3.装箱和拆箱\3.装箱和拆箱\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件       1060  2014-10-27 14:24  3.装箱和拆箱\3.装箱和拆箱\Program.cs

     文件       1390  2014-10-27 14:19  3.装箱和拆箱\3.装箱和拆箱\Properties\AssemblyInfo.cs

     文件        893  2014-10-27 14:19  3.装箱和拆箱\3.装箱和拆箱.sln

    ..A..H.      9216  2014-10-27 14:19  3.装箱和拆箱\3.装箱和拆箱.suo

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱\obj\x86\Debug\TempPE

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱\obj\x86\Debug

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱\bin\Debug

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱\bin\Release

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱\obj\x86

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱\bin

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱\obj

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱\Properties

     目录          0  2014-10-27 16:36  3.装箱和拆箱\3.装箱和拆箱

     目录          0  2014-10-27 16:36  3.装箱和拆箱

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