public class Book
    {
       public int BookId { get; set; }
       public string BookTitle { get; set; }
       public Pulisher Pulisher { get; set; }
    }

    [ComplexType]
    public class Pulisher
    {
        public string PulisherName { get; set; }
        public string PulisherAddress { get; set; }
    }

    public class BookDbContext : DbContext
    {
        public BookDbContext() : base("BookDb") {
            Database.SetInitializer<BookDbContext>(
                new DropCreateDatabaseIfModelChanges<BookDbContext>()
                );
        }

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



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     public  static  Models.BookDbContext db = new Models.BookDbContext();
        static void Main(string[] args)
        {
            Models.Book book = new Models.Book
            {
                BookTitle = "EF4.1 STEP BY STEP",
                Pulisher = new Models.Pulisher
                {
                    PulisherName = "机械工业",
                    PulisherAddress = "成都"
                }
            };

            db.Books.Add(book);
            db.SaveChanges();
        }