c# 디자인 패턴

http://ehpub.co.kr/%EC%86%8C%ED%94%84%ED%8A%B8%EC%9B%A8%EC%96%B4-%EC%84%A4%EA%B3%84-c-1%EB%B6%80-%EC%83%9D%EC%84%B1-%ED%8C%A8%ED%84%B4%EB%93%A4/