public Order()
{
deliveryAddress = new Address();
lineItems = new List<LineItem>();
validationFuncs = new Dictionary<string, Func<string>>
{
{"UserName", () => string.IsNullOrEmpty(UserName)? "User Name should not be empty": string.Empty},
{"NeedDelivery", () => NeedDelivery == null? "Please select if you need delivery.": string.Empty},
{"DeliveryAddress", () => (NeedDelivery != null && NeedDelivery.Value && !DeliveryAddress.IsValid)? "Address is invalid.": string.Empty},
{"LineItems", () => LineItems.Any(item => !item.IsValid) ? "Line items are invalid.": string.Empty}
};
}
public AddressViewModel(Address address)
{
this.address = address;
}