CodeFirst

 public class LibraryContext : DbContext
    {
        public LibraryContext()
            : base("name=DbConnectionString")
        { }
        public DbSet<Publisher> Publishers { get; set; }
        public DbSet<Book> Books { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            //For Identity Column (Primary Key)
            modelBuilder.Entity<Publisher>().HasKey(p => p.PublisherId);
            modelBuilder.Entity<Book>().HasKey(b => b.BookId);
            //For Autogenerate of Primary Key
            modelBuilder.Entity<Publisher>().Property(p => p.PublisherId).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
            modelBuilder.Entity<Book>().Property(b => b.BookId).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
            //Relation ship of Tables
            modelBuilder.Entity<Book>().HasRequired(p => p.Publisher).WithMany(b => b.Books).HasForeignKey(b => b.PublisherId);

            base.OnModelCreating(modelBuilder);
        }
    }
    public class Publisher
    {
        public int PublisherId { get; set; }
        public string PublisherName { get; set; }
        public string Address { get; set; }
        public ICollection<Book> Books { get; set; }
    }
    public class Book
    {
        public int BookId { get; set; }
        public string Title { get; set; }
        public string Year { get; set; }
        public int PublisherId { get; set; }
        public Publisher Publisher { get; set; }
    }