param在c#中意味着什么(不是params)

我找到了以下属性声明.

     [param: MarshalAs(UnmanagedType.LPTStr)]

什么param关键字在这个上下文中意味着什么,我们为什么要使用它？

param是属性目标.从MSDN引用:

可能的目标值列表如下表所示.

 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设置器,并将该属性分配给(隐式)value参数.