https://nplus.wiki/agile-principles-patterns-practices-csharp/docs/section-4-packaging-the-payroll-system/28-principles-of-package-and-component-design/Recent content in Principles of Package and Component Design on 無瑕的程式碼 敏捷完整篇：物件導向原則、設計模式與 C# 實踐Hugozh