Design Patterns Implementation in Java and C#.
[1] Bridge Pattern http://ahmedhanibrahim.wordpress.com/2014/10/02/bridge-pattern/
[2] Adapter Pattern http://ahmedhanibrahim.wordpress.com/2014/10/03/adapter-pattern/
[3] Chain of Responsibility http://moustaphasaad.wordpress.com/2014/10/04/chain-of-responsibility/
[4] Facade Pattern http://ahmedhanibrahim.wordpress.com/2014/10/05/facade-pattern/