Dependency Injection in C#
Dependency Injection (DI) is a design pattern and a technique used in software development, particularly in object-oriented programming, to manage the dependencies between different components or classes in a more flexible and maintainable way. The primary goal of Dependency Injection is to decouple the components of an application, making them easier to test, reuse, and maintain.
In traditional programming, when one class or component depends on another, it directly creates an instance of the dependent class. This creates a tight coupling between the two, making it challenging to change or extend the code without affecting other parts of the system. Dependency Injection addresses this issue by inverting the control of object creation and passing dependencies from the dependent class to an external entity.
Dependency occurs when an object(a client) relies on another object(a service) to exist. An injector passes the service code to the client.
The client object does not build a new object that it requires. Instead, it mocks the service object through an injector. This is known as dependency injection.
Let’s say we have a simple interface IMessageService representing a messaging service, and we want to inject this service into a class MessageProcessor. The MessageProcessor class will use the injected service to send a…
