public ListingTypeVo insert(ListingTypeVo input)
        {
            using (var db = new MainDb())
            {

                db.listingTypes.Add(input);
                db.SaveChanges();

                return input;
            }
        }
        public ListingTypeVo update(ListingTypeVo input, int? listingTypeId= null)
        {
            using (var db = new MainDb())
            {

                if (listingTypeId == null)
                    listingTypeId = input.listingTypeId;

                var res = db.listingTypes.FirstOrDefault(e => e.listingTypeId == listingTypeId);

                if (res == null) return null;

                input.created = res.created;
               // input.createdBy = res.createdBy;
                db.Entry(res).CurrentValues.SetValues(input);

                db.SaveChanges();
                return res;

            }
        }