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); } }