This document discusses dependency injection in .NET, including an overview of dependency injection, the benefits it provides like loose coupling and lifetime management, how to configure a dependency injection container either manually or via attributes, different injection patterns to choose from, anti-patterns to avoid, using dependency injection in ASP.NET MVC, lifetime management options, interceptors, and popular .NET dependency injection containers.

1. Dependency Injection
in .NET
Remigiusz Koczapski
http://blog.koczapski.com

2. Java and Spring Container

3. Dependency injection
• Dependency Injection
• Poor Man's DI
• Inversion of Control

4. Props of DI
• Loose coupling
• Setup problem solving
• Lifetime management
• Interception and cross-cutting concerns

5. Dependencies
• What to inject
• Seams
• Volatile and Stable Dependencies
• Where to inject
• Composition Root
• How to inject
• Register Resolve Release (3-call Pattern)

6. DI Container Configuration
Code: ManualXML
Code: Auto-wiring

7. DI Patterns
Method InjectionConstructor Injection
Property Injection Ambient Context

8. DI Patterns - which to choose
© Mark Seeman – Dependency Injection in .NET

9. DI Anti-Patterns
Bastard InjectionControl Freak
Constrained Construction Service Locator

10. DI in ASP.NET MVC
• Custom Controller Factory – Ideal composition root
• Dependency Resolver - Service Locator Anti-Pattern
(with no Release method)

11. Lifetime Management
• Transient
• Singleton
• Thread
• Request

12. Interception
• Surrounding invoked method
• Cross-cutting Concerns
• Decorator Pattern
• SRP & OCP
• Aspect Oriented Programming
• Dynamic Interception
© Mark Seeman – Dependency Injection in .NET

13. DI Containers
• Castle Windsor
• Sprint.NET
• StructureMap
• Autofac
• Ninject
• Mef
• Unity
• Differences
• Registration order
• Lifetime Management names and
options
• Configuration support
• Implementation Binding
• Sequence Binding
• Named Instances