1. Fork this repository
2. Clone your fork to your machine
3. Open the ef.intro.sln in Visual Studio
4. Note: There are no controllers in this project!! A current way of writing endpoints is in the EndPoint directory. See How the AuthorApi.cs & BookApi.cs both are extension methods of the WebApplication class which is returned in the Program.cs from a builder.Build() call. This way we can call this to initialize from the extension method. See also how the data is populated via the Seed() method call. Note how we are randomly generating names of both authors & books!

Complete the LibraryRepository.cs. Finish all methods, replacing "throw new NotImplementedException();" with relevant C# Entity Framework code by using the LibraryContext.

Add a Publisher Model with propertyies Id(int) and Name(string), a PublisherController (if you can create in a similar way to AuthorApi.cs/BookApi.cs then great!
otherwise create in the usual way in the Controllers folder.), update ILibraryRepository, LibraryRepository and LibraryContext
and any other place you feel relevant to wire in the Publisher into the project. Don't forget to link the Publisher by Id as a foreign key to the Book object (decorate accordingly!).

In the Seed class populate the db by using the context class (hopefully you added a new Publisher DbSet in the Context) with some test data. You can call the GeneratePublisherName() to generate a name or make up your own version of this. As each publisher is added to the book object you should populate before the book population code, then randomly create a publisher for a book (tip.. use a similar approach to the book.AuthorId = authors[authorRandom.Next(authors.Count)].Id);)