public bool InsertMangment(int ItemID, int StorageID, int Amount) { Warehouse warehouse = new Warehouse() { ItemID = ItemID, StorageID = StorageID }; WarehouseRepository warehouseRepository = new WarehouseRepository(); Warehouse Getwarehouse = warehouseRepository.Getwarehouse(warehouse); if (Getwarehouse == null) { warehouse.Available = Amount; warehouseRepository.AddNewWarehouse(warehouse); return(true); } else { Getwarehouse.Available += Amount; warehouseRepository.UpdateWarehouse(Getwarehouse); return(true); } }