/// <summary>
/// 添加发动机租赁订单行
/// </summary>
/// <param name="price">单价</param>
/// <param name="amount">数量</param>
/// <param name="discount">折扣</param>
/// <param name="delivery">预计交付日期</param>
/// <returns>发动机租赁订单行</returns>
public EngineLeaseOrderLine AddNewEngineLeaseOrderLine(decimal price, int amount, decimal discount,
DateTime delivery)
{
var engineLeaseOrderLine = new EngineLeaseOrderLine();
engineLeaseOrderLine.GenerateNewIdentity();
engineLeaseOrderLine.OrderId = Id;
engineLeaseOrderLine.UnitPrice = price;
engineLeaseOrderLine.Amount = amount;
engineLeaseOrderLine.Discount = discount;
engineLeaseOrderLine.EstimateDeliveryDate = delivery;
OrderLines.Add(engineLeaseOrderLine);
return engineLeaseOrderLine;
}
