I just came across a blog from Fredrik Normén talking about Dependency Injection and Mock object. I have been using those a lot in my recent projects. Fredrik’s blog gives me a very intertesting idea how to organize and test my application. Currently I seperates the test project from the production project. After I tested my DAL and BLL, then integrate them together into main project. Now I am thinking about to Mock BLL and DAL and inject them into web/Wind project, so that I can test the whole application without touching database.