How to query many-to-many releationship in EF Core

Question

I\'m using .NET Core and EF Core for a web project. I\'m struggling how to query a many-to-many releationship. This is what my models look like:

public class         


        

Answer 1

Extending @Richard's answer :

I noticed in Visual Studio 2017 15.5.6 when I do following:

            return _context.Begrip
            .Include(x => x.Categories)
                .ThenInclude(y => y.)

IntelliSense at first tells me that y if of type ICollection of BegripCategory presenting methods suitable for collections what is confusing especially that when I start typing "category" (in place of "nothing typed in here yet") IntelliSense changes as if we were dealing with only a single instance instead of ICollection

Just a tiny remark, but I hope it will help to save a few minutes time confusion.