SignalR - Real-time Application Development - Second Edition

Decoupling – the next level

In this chapter, one of the things we will brush up is the usage of the Dependency Inversion Principle, the D of SOLID. Let's start with the first principle: the S in SOLID stands for Single Responsibility Principle, which states that a method or a class should only have one reason to change and only have one responsibility. With this, we can't have our units take on more than one responsibility and need help from collaborators to do the entire job. These collaborators are things we now depend on and we should represent these dependencies clearly to our units so that anyone or anything instantiating it knows what we are depending on. We have now flipped around the way in which we get dependencies. Instead of the unit ...