/// <summary> Get all categories from the database and return the necessary info as a list of data transfer object </summary>
 public IEnumerable <CategoryReqNineDTO> GetCategoriesAsDTOs()
 {
     try
     {
         var cList = GetCategories();
         return(CategoryMapper.MapCategoriesToCategoryReqNineDTOs(cList));
     }
     catch (Exception ex)
     {
         UnitOfWork.WriteErrorLog(ex);
     }
     return(null);
 }