值类型如何从System.ValueType和System.Object继承 [英] How value types inherits from System.ValueType and System.Object

问题描述

值类型如何从

System.ValueType

和

System.Object

继承而值类型是struct，

,while value types are struct,
and don''t have inheritance?

推荐答案

所有类型都从System.Object继承，包括System.ValueType，所有值类型都从System.ValueType继承.

没有继承的值类型呢?它们有两种形式:普通的值形式"和盒装形式，它们确实支持继承. CLR的一个巧妙技巧是:只要您对值类型的任何方面都感兴趣，它就会为您带来盒装形式.例如，碰巧是您为System.Object变量分配值对象或使用GetType().换句话说:没有办法将纯"非盒装值类型用作类型.

请参阅: http://msdn.microsoft.com/en-us/library/yz2be5wk.aspx [^ ].

—SA

All types are inherited from System.Object, including System.ValueType, and all value types inherit from System.ValueType.

What about value types which do not have inheritance? They have two forms: a normal "value form" and a boxed form, which does support inheritance. The sly trick of CLR here is this: as soon as you are interested in any aspect of the value type as a type, it brings you a boxed form of it. For example, it happens is you assign a value object to System.Object variable or use GetType(). In other words: there are no ways to work with a "pure" non-boxed value type as a type.

Please see: http://msdn.microsoft.com/en-us/library/yz2be5wk.aspx[^].

—SA

引用该线程
http://stackoverflow.com/questions/4729094/value-types-inherit- from-system-object-why [ ^ ]
和
http://stackoverflow.com/questions/436211/is-everything-in- net-an-object/436246 [ ^ ]

Refer this thread
http://stackoverflow.com/questions/4729094/value-types-inherit-from-system-object-why[^]
and
http://stackoverflow.com/questions/436211/is-everything-in-net-an-object/436246[^]

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