public void AddComment(Comment comment)
        {
            var ctx = new BlogPostDbContext(_connectionString);

            ctx.Comments.Add(comment);
            ctx.SaveChanges();
        }
        public void AddBlogPost(BlogPost blogPost)
        {
            var ctx = new BlogPostDbContext(_connectionString);

            ctx.BlogPosts.Add(blogPost);
            ctx.SaveChanges();
        }