Dependency Injection, the right way

Salle A104, 10:30 - 11:15

• Microsoft

“Program to an interface, not an implementation” they[1] say …

But when IMyInterface foo = new IMyInterface() is not valid code … how are you supposed to achieve that ? The answer is Dependency Injection.

In this talk, we’ll talk about Dependency injection, what it is and what it is not. We’ll see how it is a valuable set of practices and patterns that help design maintainable software built on top of the SOLID object-oriented principles.

We’ll see how, when used properly, it delivers many benefits such as extensibility and testability … We’ll also cover some anti-patterns, ways of using Dependency Injection that can lead to code that is painful to understand and maintain

This talk is not about DI/IOC containers per se, but focuses on the core concepts of Dependency Injection. Those concepts are essential to understand how to use those “magic-looking” tools (if they are needed at all …)

This talk is not only for .NET developers. It will contain code examples written in C#, but should be understandable by developers with knowledge in other statically-typed object-oriented languages such as Java, Vb.NET, C++ …

[1] Gang of Four - Design Patterns: Elements of Reusable Object-Oriented Software

• Level: Ha (intermédiaire), Ri (avancé)

• Topic: Dependency Injection, SOLID principles

Slides, code & other materials provided by speaker

• Slides
• Code (GitHub)