public Order(
Guid orderId,
DiningLocation diningLocation,
OrderItem[] orderItems,
IProductInfo[] products)
: this()
{
var price = orderItems
.Select(i => new
{
product = products.Single(p => p.MenuItemId == i.MenuItemId),
item = i
})
.Select(i => i.item.Quantity*i.product.Price)
.Sum();
var e = new OrderPlaced(
orderId,
diningLocation,
orderItems,
price);
ApplyChange(e);
}