Mastering ASP.NET Web API

The ConfigureServices method

The ConfigureServices method sets all the services to be available for the application to run using the dependency injection (DI). It adds the services list to the IServiceCollection instance, and is called before Configure.

The reason why this method gets called first by runtime is because some features such as MVC, Identity, Entity Framework, and so on, need to be added before they are ready for the request pipeline processing. For this reason, in the preceding code, we saw services.AddMvc().

The ConfigureServices method helps achieve the dependency injection pattern in ASP.NET Core apps. Let's see a simple example, assuming that we wrote the NewsOfDay class by implementing the INewsOfDay interface. I want to ...