说明：  关于C#中委托、接口的一种理解方式。 将紧耦合、异步通知、静态监听者等融合进一个代码故事增强其可理解性。 适合CSharp学习者阅读
(on C# entrusted Interface an understanding manner. Will be tightly coupled, asynchronous notification, passive integration, such as the interception of a code into the story to enhance their understandability. CSharp reading for learners)