委托和接口的选择

A delegate design might be a better choice than an interface design if one or more of these conditions are true: • The interface defines only a single method. • Multicast capability is needed. • The subscriber needs to implement the interface multiple times.

如果满足以下一个或多个条件，委托设计可能比接口设计更好： • 接口仅定义一个方法。 • 需要多播功能。 • 订阅者需要多次实现该接口。