在某位（实在忘记是谁了，好像博主把连接里的文章翻译成中文了）的博客里看到一个连接，题目是C#Heap(ing)Vs Stack(ing) in.NET，主要就是讲内存管理，非常具体生动，里面还有很多图例。http://www.c-sharpcorner.com/UploadFile/rmcochran/csharp_memory01122006130034PM/csharp_memory.aspx。我现在只看了Part I和Part II。继续复述总结加强理解。
Stack: is more or less responsible for keeping track of what's executing in our code (or what's been "called"). It's self-maintaining, meaning that it basically takes care of its own memory management. When the top "box" is no longer used, it's thrown out.
Heap: is more or less responsible for keeping track of our objects. Heap has to worry about Garbage Collection.
程序执行时，主要有四种类型要存放在Stack 和Heap中，他们是：值类型，引用类型，指针(Pointers，我觉得这个是指向引用类型的值类型或者引用类型)，Instructions(还没遇到过，不知道怎么翻译)
C#中的值类型：
- bool
- byte
- char
- decimal
- double
- enum
- float
- int
- long
- sbyte
- short
- struct
- uint
- ulong
- ushort
引用类型：
- class
- interface
- delegate
- object
- string
怎么决定什么类型放在什么位置？文章讲了一个黄金准则：
1. 引用类型永远存储在Heap里
2. 值类型在哪里声明就存储在哪里
文章里举了很多从简单到复杂的例子来解释这两条准则，后面的的确很难。先记住这个准则。