ConditionalAttribute等特殊类

本文介绍了ConditionalAttribute等特殊类的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

ConditionalAttribute 可用于消除呼叫取决于所定义的编译器的符号的显着的方法。我假设我们不能创建该类自己，因为编译器必须专门寻找它。

The ConditionalAttribute can be used to remove calls to a marked method depending on the compiler symbols defined. I'm assuming we could not create this class ourselves since the compiler must be looking for it specifically.

我想知道其他班级也有编译器，或者使用的语言，我们不能code自己。

I was wondering what other classes there are that the compiler, or language uses that we could not code ourselves.

推荐答案

• 编译器查找 [ExtensionAttribute] 指示扩展方法（和包含扩展方法的类）。

• The compiler looks for [ExtensionAttribute] to indicate extension methods (and classes containing extension methods).

  [ DynamicAttribute] 是用来表示一个成员都应该为类型进行治疗动态（即使会员类型本身也只是对象）

  [DynamicAttribute] is used to indicate that a member should be treated as type dynamic (even though the member type itself will just be object)

  [InternalsVisibleTo] 允许一个程序集访问另一个人的内部成员。

  [InternalsVisibleTo] allows one assembly to access the internal members of another.

  基本上去翻 System.Runtime.CompilerServices 命名空间，并检查存在的属性......许多人将予以特殊的在的编译器，即使它不是C＃编译器（例如： DateTimeConstantAttribute 是不使用C＃编译器，据我所知，但 DecimalConstantAttribute 是，它是的可能的是，C＃编译器的消耗的恒的DateTime 即使它不会产生这些价值观......）

  Basically look through the System.Runtime.CompilerServices namespace, and examine the attributes in there... many of them will be handled specially by a compiler, even if it's not the C# compiler (e.g. DateTimeConstantAttribute isn't used by the C# compiler as far as I'm aware, but DecimalConstantAttribute is. It's possible that the C# compiler will consume constant DateTime values even though it won't produce them...)