Application services can be loosely compared with the business logic layer of the yesteryear with one key difference, application services don’t actually contain any business logic neither they enforce any business logic.

Having read Vaugh Vernon’s book on DDD implementation, I decided to portgrade (port+upgrade) my old clunky Windows based N-tier desktop expense tracking application to ASP.NET Core MVC application using some of the Domain Driven Design concepts I studied in the book.