值类型VS参考类型 - 对象类C＃ [英] Value Type Vs Reference Type - Object Class C#

问题描述

如果值类型和引用类型是从哪个是引用类型，那么值类型是如何值类型和引用类型的引用时，他们都来自refernce类型前来对象类型。

if Value Types and Reference Type are from Object Type which is a reference type, then how value type is value type and reference type is reference when they all come from refernce type.

推荐答案

基本上，这是个骗子;-p

Basically, it is a cheat ;-p

任何结构（即从值类型继承任何东西）与价值型的语义处理。但是有一个装箱转换以对象都是必要的;这意味着，如果你投一个包含结构到对象，它会创建一个特殊的对象（在托管堆中）从你的价值*。

Any struct (i.e. anything inherited from ValueType) is treated with value-type semantics. But there is a boxing conversion to object as necessary; meaning that if you cast a struct to an object, it will create a special object (on the managed heap) containing the data (as a clone) from your value*.

盒装版是引用类型。您可以拆箱这（通过铸造）回到结构版本，逆转这个（复印件从堆上的对象克隆数据到本地值）。

The boxed version is a reference-type. You can unbox this (by casting) back to the struct version, which reverses this (copies the clones data from the object on the heap into your local value).

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* =除非它是一个空的可空< T> ，这盒空;同样，空 unboxes为空可空< T>

*=unless it is an empty Nullable<T>, which boxes to null; likewise, null unboxes to an empty Nullable<T>.

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