.net core code frist带数据库迁移

 public class Book
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public DateTime ReleaseDate { get; set; }
        public string Author { get; set; }
        public decimal Price { get; set; }
    }

 public class BookContext : DbContext
    {
        public BookContext(DbContextOptions<BookContext> options)
                : base(options)
        {

        }

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