Sample applications on Asp.net MVC 5 with business logic layer?

Question

ASP.NET

What are open projects for asp.net mvc 5 and asp.net web api 2, where there is a layer of business logic?
Where to read how to properly organize the structure of a medium / large application? How to properly separate the layer of business logic, ui, and data so that the project can be easily maintained and expanded in the future?

Answer 1

pick nopcommerce, although it is overcomplicated, it is good as an example