Dependency Injection

                       

Define dependency injection in simple word ChatGPT Dependency Injection (DI) is a design pattern used in programming to make a class independent of its dependencies. In simple words, instead of a class creating its own objects (dependencies), these objects are provided to the class from the outside. This approach makes the code more modular, easier to test, and more maintainable. Key Points: Decoupling: DI reduces the tight coupling between classes by allowing dependencies to be injected rather than hard-coded. Flexibility: It makes it easy to change or extend the behavior of a class without modifying its code. Testability: By injecting dependencies, it's easier to substitute real implementations with mock objects during testing. Example: Without DI: csharp Copy code public class Car { private Engine engine = new Engine(); // Car creates its own Engine public void Start() { engine.Run(); } } With DI: csharp Copy code public class Car { private Engine engine; // Engine is injected via the constructor public Car(Engine engine) { this.engine = engine; } public void Start() { engine.Run(); } } In this DI example, Engine can be injected from outside, making Car independent of the specific Engine implementation. This makes it easy to replace Engine with a mock or different implementation without changing the Car class.