how to get specific data and save it?

Question

ill try to get the all ID with status of  "Picked-up" in other table. im newbie here im using c# asp.net mvc

 

this is my code any suggest on how to do. thanks in advance

 

var package = _packageService.GetAll().Where(x => x.Status == "Picked-up");

                        var shipmentItem = new ShipmentItems
                        {
                            ShipmentId = model.ShipmentId
                        };

                        if (package != null)
                        {
                            shipmentItem.PackageId = package.Id;
                        }

                        _shipmentItemService.Add(shipmentItem);
                        return RedirectToAction("addshipmentitem");