// @nuget: EntityFramework

using System;

using System.Data.Entity;

using System.Linq;

using System.Collections.Generic;

using System.ComponentModel.DataAnnotations.Schema;

using System.ComponentModel.DataAnnotations;

​

public class Program

{

    public static void Main()

    {

        InsertData();

        using (var context = new BookStore())

        {

            FiddleHelper.WriteTable(context.Authors.ToList());

            FiddleHelper.WriteTable(context.Books.ToList());

            var author = context.Authors

                .FirstOrDefault();

            context.Authors.Remove(author);

            context.SaveChanges();

            Console.WriteLine("\n\nAfter Delete\n\n");

            FiddleHelper.WriteTable(context.Authors.ToList());

            FiddleHelper.WriteTable(context.Books.ToList());

        }

    }

    public static void InsertData()

    {

        using (var context = new BookStore())

        {

            Author author1 = new Author()

            {

                Name = "Mark",

                Books = new List<Book>

                {

                    new Book() { Title = "Fundamentals of Computer Programming with C#"},

                    new Book() { Title = "Java: A Beginner's Guide"},

                }

            };

            Author author2 = new Author()

            {

                Name = "Andy",

                Books = new List<Book>

                {

                    new Book() { Title = "SQL: The Ultimate Beginners Guide"}

                }

            };

            Author author3 = new Author()

            {

                Name = "Johny",

                Books = new List<Book>

                {

                    new Book() { Title = "Learn VB.NET"},

                    new Book() { Title = "C# Fundamentals for Absolute Beginners"},

                }

            };

            context.Authors.Add(author1);

            context.Authors.Add(author2);

            context.Authors.Add(author3);

​

            context.SaveChanges();

        }

    }

    public class BookStore : DbContext

    {

        public BookStore() : base(FiddleHelper.GetConnectionStringSqlServer())

        {

        }

​

        public DbSet<Author> Authors { get; set; }

        public DbSet<Book> Books { get; set; }

    }

​

    public class Book

    {

        public int BookId { get; set; }

        public string Title { get; set; }

        public Author Author { get; set; }

    }

​

    public class Author

    {

        public int AuthorId { get; set; }

        public string Name { get; set; }

        public virtual ICollection<Book> Books { get; set; }

    }

}