Specifies that one or more declared member variables refer to an instance of a class that can raise events.

指定一个或多个已声明成员变量引用可引发事件的类的实例。

youdao

Specifies that one or more declared member variables refer to an instance of a class that can raise events.

指定一个或多个已声明成员变量引用可引发事件的类的实例。

youdao