30.第一个Linq 数据库查询

            CustomerOrderEntities entity = new CustomerOrderEntities();
            var queryResult = from n in entity.tblCustomer where n.Region =="Asia" select new { n.CustomerName,Orders= n.btlOrder};

            foreach (var item in queryResult)
            {
                Console.WriteLine(item.CustomerName);
                foreach (btlOrder o in item.Orders)
                    Console.WriteLine("orderId:" + o.OrderId + " Amount:" + o.Qty * o.Price);
            }