如何使 .NET 属性仅对某些类型有效 [英] How to make .NET attribute only valid on certain types

问题描述

可能重复:
指定 .NET 属性目标所需的基类

我想指定我的自定义属性仅对某些类型有效(基于接口或基类).
像这样:

I want to specify that my custom attribute only be valid on certain types (based on interface or base class).
Like this:

我该怎么做?

推荐答案

听起来你想创建一个 Attribute，它只能应用于某些类型，就像 AttributeUsage 只能应用于派生自 Attribute 的类型.引入这种类型的自定义限制是不可能的.您看到的特定错误不是因为自定义限制，而是简单地硬连接到编译器本身.

It sounds like you want to create an Attribute which can only be applied to certain types in much the way that AttributeUsage can only be applied to types deriving from Attribute. Introducing this type of custom restriction is simply not possible. The particular error you're seeing is not because of a custom restriction, it's one that's simply hard wired into the compiler itself.

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