public ActionResult MoveCheckpointDown(int checkpointID, int startingNumber, int checkpointOrderId) { CheckpointOrderModel model = (CheckpointOrderModel)Session["checkpoint"]; model.MoveCheckpointDown(checkpointID, startingNumber, checkpointOrderId); TimeMergerModel.Merge(checkpointID); return Content(model.CheckpointOrderDic.ToListboxvalues(toTimer: false)); }