/// <summary>
/// 添加发动机购买订单行
/// </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>发动机购买订单行</returns>
public EnginePurchaseOrderLine AddNewEnginePurchaseOrderLine(decimal price, int amount, decimal discount,
DateTime delivery)
{
var enginePurchaseOrderLine = new EnginePurchaseOrderLine();
enginePurchaseOrderLine.GenerateNewIdentity();
enginePurchaseOrderLine.OrderId = Id;
enginePurchaseOrderLine.UnitPrice = price;
enginePurchaseOrderLine.Amount = amount;
enginePurchaseOrderLine.Discount = discount;
enginePurchaseOrderLine.EstimateDeliveryDate = delivery;
OrderLines.Add(enginePurchaseOrderLine);
return enginePurchaseOrderLine;
}
