public SellingOrderDto GetSellingOrder(int id)
        {
            var order = _orderRepo.GetById(id);

            order.Customer = _customerRepo.GetById(order.CustomerId);
            var sellingTransactions = _transRepo.GetTransactionBySellingId(id);
            var orderDto            = _mapper.Map <SellingOrderDto>(order);

            orderDto.SellingTransactions = _mapper.Map <List <SellingTransactionDto> >(sellingTransactions);
            return(orderDto);
        }