public Category GetCategoryOrNull(int id) { _logger.Info($"BLL.{nameof(CategoryBll)}.{nameof(GetCategoryOrNull)}: Getting the category id = " + id); if (_categoryDao.IsCategory(id)) { _logger.Info($"BLL.{nameof(CategoryBll)}.{nameof(GetCategoryOrNull)}: Category id = {id} received"); return(_categoryDao.GetCategory(id)); } else { _logger.Warn($"BLL.{nameof(CategoryBll)}.{nameof(GetCategoryOrNull)}: Category id = {id} not found"); return(null); } }