Dependency Injection

Simply Dependency Injection means giving an object its dependencies, instead of them itself having initializing them. Dependency Injection is useful for testing as well. Because it allows dependencies to be mocked or stubbed out. 

Types of Dependency Injection ##

Constructor injection

Setting dependencies through constructor

Brilliant Example - Programmers SO

Setter injection

Setting dependencies using Setter method

Interface injection 


http://stackoverflow.com/questions/12246438/constructor-injection-and-initialization-of-dependencies-being-injected
http://programmers.stackexchange.com/questions/190120/should-i-use-dependency-injection-or-static-factories


What is a Dependency Resolver
Allows you to abstract away Dependency Injection implementation 
http://stackoverflow.com/questions/20086440/asp-net-mvc-4-dependency-resolver

What is interception


You can use Unity for Dependency Injection in .NET. Read this comprehensive article set on unity.

Dependency Inversion in JavaScript

http://stackoverflow.com/questions/5349003/dependency-inversion-principle-in-javascript

Resources

https://www.youtube.com/watch?v=FuAhnqSDe-o

http://stackoverflow.com/questions/13442312/when-do-i-use-abstract-class-or-interface-in-dependency-injection

http://stackoverflow.com/questions/13442312/when-do-i-use-abstract-class-or-interface-in-dependency-injection

https://richnewman.wordpress.com/about/code-listings-and-diagrams/dependency-injection-examples/dependency-injection-example-interface-injection/