From Martin Fowler
http://martinfowler.com/articles/injection.html#ServiceLocatorVsDependencyInjection
From Stackoverflow
http://stackoverflow.com/questions/1557781/whats-the-difference-between-the-dependency-injection-and-service-locator-patte
Will try to write home-made Service Locator first to see what happen.
If any problem, will try DI containers, such Autofac
