public async Task <BlogClass> AddClassAsync(ClassInfoDTO classDTO)
        {
            BlogClass blogClass = classDTO.MapTo <BlogClass>();

            blogClass.GenerateNewIdentity();

            return(await _classDS.AddAsync(blogClass));
        }
        public void AddClass(ClassInfoDTO classDTO)
        {
            BlogClass blogClass = classDTO.MapTo <BlogClass>();

            _classDS.Add(blogClass);
        }