Order

Order.cs

public class Order
{
    private Guid _userId;
    private Guid _storeId;
    private DateTime _dispatchDate;
    ...

    public class Factory
    {
        public Order CreateNewOrder(Action<OrderConfiguration> configurator)
        {
            var configuration = new OrderConfiguration();
            configurator(configuration);

            var order = new Order();
            order._userId = configuration.UserId;
            order._storeId = configuration.StoreId;
            order._dispatchDate = configuration.DispatchDate;

            return order;
        } 
    }
}