Entity Framework Include Discover to Specify Related Entities

public class Book
{
    public int Id { get; set; }
    public string Title { get; set; }
    public int AuthorId { get; set; }
    [ForeignKey("AuthorId")]
    public Author Author { get; set; }
}

public class Author
{
    public int AuthorId { get; set; }
    public string Name { get; set; }
    public ICollection<Book> Books { get; set; }
}

using (var context = new BookStore())
{
    var authors = context.Authors
        .Include(a => a.Books)
        .ToList();
}

using (var context = new BookStore())
{
    var authors = context.Authors
        .Include("Books")
        .ToList();
}