protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
EntityTypeBuilder<BookChapter> chapter = modelBuilder.Entity<BookChapter>();
chapter.ToTable("Chapters").HasKey(p => p.Id);
chapter.Property<Guid>(p => p.Id).HasColumnType("UniqueIdentifier").HasDefaultValueSql("newid()");
chapter.Property<string>(p => p.Title).HasMaxLength(120);
}
}