What is dependency injection in ASP.NET MVC?

Answer 1

The Dependency Injection pattern is a particular implementation of Inversion of Control. Inversion of Control (IoC) means that objects do not create other objects on which they rely to do their work. Instead, they get the objects that they need from an outside source (for example, an xml configuration file).

Dependency Injection (DI) means that this is done without the object intervention, usually by a framework component that passes constructor parameters and set properties.

The advantages of using Dependency Injection pattern and Inversion of Control are the following:

1. Reduces class coupling
2. Increases code reusing
3. Improves code maintainability
4. Improves application testing