说明： 戏说面向对象程序设计C#板！文章很生动！很容易理解！适合学习设计模式的初学者！有经验者也可重新温习！会有新的体验！ (Joking OOP C# Board! The article is very lively! It is easy to understand! Learning design patterns suitable for beginners! Experience can also be re-study! There will be a new experience!)
