public void UpdateWarhouse(Administrator admin)

         {

             var warhouseStr = Request["warhouse"];

             if (!string.IsNullOrEmpty(warhouseStr))

             {

                 var storageListAll = CacheAccess.GetStorages(_storageContract);

                 int[] selectedId = warhouseStr.Split(',').Select(c => Convert.ToInt32(c)).ToArray();

                 List<Storage> selectStorages=storageListAll.Where(c=> selectedId.Contains(c.Id)).ToList();

                 List<Storage> removeStorages = admin.Stoages.Where(c => !selectStorages.Contains(c)).ToList();

                 List<Storage> newAddStorages = selectStorages.Where(c => !admin.Stoages.Contains(c)).ToList();

                 foreach (var item in removeStorages)

                 {

                     admin.Stoages.Remove(item);

                 }

                 foreach(var item in newAddStorages)

                 {

                     admin.Stoages.Add(item);

                 }

             }

         }