Dependency Injection (DI) is a fundamental concept in software development, and it plays a crucial role in building maintainable, testable, and scalable applications in C#. In this article, we will delve into the key aspects of Dependency Injection, its benefits, and how it is implemented in C#.
What is Dependency Injection?
Dependency Injection is a design pattern that promotes the separation of concerns in an application by decoupling the components that depend on each other. In simple terms, it is a technique that allows you to provide the dependencies that a class requires from the outside, rather than creating them within the class. This approach helps to reduce the tight coupling between classes, making your code more modular and flexible.
Example:
Let’s consider a common scenario: you have a `UserService` class that needs access to a `UserRepository` to perform database operations. Without Dependency Injection, you might instantiate the `UserRepository` inside the `UserService` class. With Dependency Injection, you inject the `UserRepository` into the `UserService` from the outside. Here’s how it looks in code:
// Without Dependency Injection
public class UserService
{
private UserRepository _userRepository = new UserRepository();
public…
