var orders
                    = useString
                        ? context.Set<Order>()
                            .Include("Customer")
                            .Select(o => new
                            {
                                o,
                                O2 = o,
                                C = o.Customer
                            })
                            .ToList()
                        : context.Set<Order>()
                            .Include(o => o.Customer)
                            .Select(o => new
                            {
                                o,
                                O2 = o,
                                C = o.Customer
                            })
                            .ToList();