c# - param 在 c# 中意味着什么(不是 params)

Question

这个问题已经有答案了:

What does [param: NotNull] mean in C#? (2 个回答)

已关闭 7 年前。

我发现了以下属性声明。

     [param: MarshalAs(UnmanagedType.LPTStr)]

param 关键字在这种情况下意味着什么以及为什么我们应该使用它？

Answer 1

param 是属性目标。引用自MSDN :

The list of possible target values is shown in the following table.

 C#            Visual Basic    Applies to
   
 assembly      Assembly        Entire assembly module        Module          Current assembly module (which is different from a                                 Visual Basic Module) field         Not supported   Field in a class or a struct event         Not supported   Event method        Not supported   Method or get and set property accessors param         Not supported   Method parameters or set property accessor parameters property      Not supported   Property  return        Not supported   Return value of a method, property indexer, or                                 get property accessor type          Not supported   Struct, class, interface, enum, or delegate

在您的示例中，该属性可能用于属性 setter ，并将该属性分配给(隐式)value 参数。