HFT MINFO LAYERING code snippets

Blog.cs

// ##################################################################
//
//      BLOG
//
// ##################################################################

[Table("Blogs")]
public class Blog
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int BlogId { get; set; }

    [Required]
    [MaxLength(100)]
    public string Title { get; set; }

    [MaxLength(100)]
    public string Category { get; set; }

    public string Tags { get; set; }

    public bool? HasImage { get; set; }

    public bool? HasLink { get; set; }

    public int? LikesCount { get; set; }

    [NotMapped]
    public string MainData => $"[{BlogId}] : {Title} : {Category} (likes: {LikesCount}) (comments: {Comments.Count()})";

    [NotMapped]
    public virtual ICollection<Comment> Comments { get; set; }

    public Blog()
    {
        Comments = new HashSet<Comment>();
    }
}

BlogContext.cs

// ##################################################################
//
//      BLOG CONTEXT
//
// ##################################################################

public class BlogContext : DbContext
{
    public virtual DbSet<Blog> Blogs { get; set; }
    public virtual DbSet<Comment> Comments { get; set; }

    public BlogContext()
    {
        this.Database.EnsureCreated();
    }

    public BlogContext(DbContextOptions<BlogContext> options)
        : base(options)
    {
    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        if (!optionsBuilder.IsConfigured)
        {
            optionsBuilder
                .UseLazyLoadingProxies()
                .UseSqlServer(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\BlogDatabase.mdf;Integrated Security=True");
        }
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        Blog b0 = new Blog() { BlogId = 1, Category = "Nature", LikesCount = 43, Title = "#1 Nature Article", Tags = "sport, education", HasLink = false, HasImage = false };
            Blog b1 = new Blog() { BlogId = 2, Category = "Nature", LikesCount = 30, Title = "#2 IT life in the nature", Tags = "IT, education", HasLink = null, HasImage = null };
            Blog b2 = new Blog() { BlogId = 3, Category = "Design", LikesCount = 120, Title = "#3 Science of Design", Tags = "programming, csharp", HasLink = true, HasImage = false };
            Blog b3 = new Blog() { BlogId = 4, Category = "Design", LikesCount = null, Title = "#4 Designing a PWA", Tags = "cuda, nvidia, core", HasLink = false, HasImage = false };
            Blog b4 = new Blog() { BlogId = 5, Category = "Frontend", LikesCount = 300, Title = "#5 Frontend Architecture", Tags = "vue, angular", HasLink = true, HasImage = true };

        // -------------------------------------------------------------------------------------------------------

        Comment c0 = new Comment() { CommentId = 1, Content = "Some words were incorrect." };
        Comment c1 = new Comment() { CommentId = 2, Content = "Lorem ipsum dolor sit amet." };
        Comment c2 = new Comment() { CommentId = 3, Content = "Great article, loved it!" };
        Comment c3 = new Comment() { CommentId = 4, Content = "Fantastic reading." };
        Comment c4 = new Comment() { CommentId = 5, Content = "Thanks for sharing this stuff!" };
        Comment c5 = new Comment() { CommentId = 6, Content = "Waste of tiiiiiiiiiiiime...." };
        Comment c6 = new Comment() { CommentId = 7, Content = "Lorem ipsum." };
        Comment c7 = new Comment() { CommentId = 8, Content = "Dolor sit amet." };
        Comment c8 = new Comment() { CommentId = 9, Content = "This is pure SH!T." };
        Comment c9 = new Comment() { CommentId = 10, Content = "Good words used here!" };

        // -------------------------------------------------------------------------------------------------------

        c0.BlogId = b0.BlogId;
        c1.BlogId = b1.BlogId;

        c2.BlogId = b2.BlogId; 
        c3.BlogId = b2.BlogId;
        c4.BlogId = b2.BlogId;
        c5.BlogId = b2.BlogId;
        c6.BlogId = b2.BlogId;

        c7.BlogId = b3.BlogId;
        c8.BlogId = b3.BlogId;

        c9.BlogId = b4.BlogId;

        // -------------------------------------------------------------------------------------------------------

        modelBuilder.Entity<Comment>(entity =>
        {
            entity.HasOne(comment => comment.Blog)
                .WithMany(blog => blog.Comments)
                .HasForeignKey(comment => comment.BlogId)
                .OnDelete(DeleteBehavior.ClientSetNull);
        });

        modelBuilder.Entity<Blog>().HasData(b0, b1, b2, b3, b4);
        modelBuilder.Entity<Comment>().HasData(c0, c1, c2, c3, c4, c5, c6, c7, c8, c9);
    }
}

Comment.cs

// ##################################################################
//
//      COMMENT
//
// ##################################################################

[Table("Comments")]
public class Comment
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int CommentId { get; set; }

    [MaxLength(120)]
    public string Content { get; set; }

    [NotMapped]
    public virtual Blog Blog { get; set; }

    [ForeignKey(nameof(Blog))]
    public int BlogId { get; set; }
}