Builder Pattern：StringBuilder
Factory Method：IHttpHandlerFactory
Adapter Pattern：COM Interop、DataAdapter
Decorator Pattern：BufferedStream、CryptoStream
Composite Pattern：Enterprise Library2.0中的ObjectBuilder
Facade Pattern：Duwamish
Flyweight Pattern：.NET中的String类型
Template Method：服务器控件
Command Pattern：MVC
Iterator Pattern：IEnumerator
Oberver Pattern：委托和事件
Strategy Patterm：System.Configuration.Provider、IComparer
Singleton Pattern：Remoting的Singleton