Dependency Injection & Middleware in .NET Core

What is Dependency Injection?

Dependency Injection (DI) is a design pattern that enables the creation of dependent objects outside of a class and provides those objects to a class in various ways. In .NET Core, DI is built-in and makes your code more modular, testable, and maintainable.

Benefits of DI in .NET Core

Reduces tight coupling between classes
Improves code testability and maintainability
Promotes best practices in software architecture

What is Middleware?

Middleware are software components that are assembled into an application pipeline to handle requests and responses. In .NET Core, middleware is used to add functionality such as authentication, logging, error handling, and more.

Example: Registering Middleware and Services

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers();
    services.AddScoped();
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseRouting();
    app.UseAuthentication();
    app.UseAuthorization();
    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });
}