private void AddTag()
        {
            Blog blog = _blogRepository.Get(_blogId);

            Console.WriteLine($"Which tag would you like to add to {blog.Title}?");
            List <Tag> tags = _tagRepository.GetAll();

            for (int i = 0; i < tags.Count; i++)
            {
                Tag tag = tags[i];
                Console.WriteLine($" {i + 1}) {tag.Name}");
            }
            Console.Write("> ");

            string input = Console.ReadLine();

            try
            {
                int choice = int.Parse(input);
                Tag tag    = tags[choice - 1];
                _blogRepository.InsertTag(blog, tag);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Invalid Selection. Won't add any tags.");
            }
        }