Dependency Injection

Question

What is the use of dependency injection in C# ? Please don't provide any links.

Shweta Lodha · Answer

It helps you to define your code in a more loosely coupled manner. So, rather than caller instantiating a new object (in C#, instantiation done using new keyword), someone else (DI container) does this for him and caller will just take a responsibility to make a call. Most common practise for achieving this is by using interfaces.

geetha geetha · Answer

Dependency injection is a design pattern, we can use a dependency injection for implementation the inversion of control. It allows the dependent object outside of a class and also it provides those object to a class through diffrent ways. We have develope a looosely coupled code uing the dependency injection . Example: We have two classes named class A and class B, Class A uses some methods of class B, this is an dependency. Class A is dependent on class B. Use of dependency injection: It makes our code more reusable and testable. Esay to refactor. DI codes are loosely coupled Type of dependency injection: Constructor Injection property Injection methode Injection

Sreekanth Reddy · Answer

Pradeep Sahoo Can you provide any situation where we go ahead with DependencyInjection ?

Pradeep Sahoo · Answer

Dependency injection is one of the design principle through which we achieve a loosely coupled systems . A good design is easy to change , provide abstraction .using dependency injection we can inject the lower module code into the higher module . There are three ways we can inject constructor , property and method level .Please read the link below. http://www.c-sharpcorner.com/UploadFilye/ff2f08/dependency-injection-pattern/ To answer your question consider you have wcf service or web api you want to call those in your controller of asp. Net mvc .Instead of creating the instance you should inject them . When wcf contract change your asp.net mvc will not impact . That is called a loosely coupled system

Dependency Injection

Answers (4)