My latest article just hit the web in the March 2008 issue of MSDN Magazine. Loosen Up: Tame Your Software Dependencies for More Flexible Apps takes you on a journey from a highly-coupled architecture, which we’re all familiar with, to gradually more loosely-coupled ones. First stop is the problems inherent in highly-coupled applications. To start solving those problems, I look to dependency inversion and service location. Next stop is poor man’s dependency injection and then a simple, hand-rolled inversion of control (IoC) container. From there, I look at the features provided by full-fledged IoC containers and use Castle Windsor as an example, along with some Binsor thrown in for configuration goodness. My goal was to help developers understand the benefits of dependency injection and IoC containers by showing them the problems solved at each stage of the journey.
A big thanks to Howard Dierking, MSDN Magazine editor extraordinaire, for his encouragement and not having an issue with using Windsor for the advanced examples. Thanks to Oren Eini for help debugging a Binsor configuration problem in one of the examples. And an especially big thanks to my spouse and two young sons for their patience while I was writing.
Thanks in advance for reading the article. I welcome your feedback and questions.