public void DeleteAllBlogSpaces(string username)
        {
            List <BlogSpace> blogs = _blogRepository
                                     .GetAllBlogSpaces()
                                     .Include(item => item.Member)
                                     .Where(item => item.Member.MemberUserName == username)
                                     .ToList();

            if (blogs != null)
            {
                blogs.ForEach(item => _articleDomainService.DeleteAllArticles(item.BlogSpaceId));
                _blogRepository.DeleteMultipleBlogSpaces(blogs);
            }
        }