C# C Linq语法联接

我有一个列表，它具有另一个子列表的属性。然后我有一个客户订单列表和错误列表。如何最好地使用错误消息更新子列表。这就是它看起来的样子：

Customer Class:
CustomerId
CustomerName
CustomerLocation
List<CustomerOrder> Orders

CustomerOrder Class:
OrderId
OrderStatus
ErrorMessage

OrderError Class:
OrderId
ErrorMessage

我需要做的是更新CustomerOrder类OrderStatus，如果我没有错误，它将被设置为p。如果我在列表中有错误，我想将OrderStatus更新为F，然后更新ErrorMessage。我想知道是否有更好的方法来代替使用join和DefaultEmpty创建“新”列表

代码：

然后显示OrderErrors列表：

var orderErrors = new List<OrderError>();
OrderError err = new OrderError();
err.OrderId = "155000";
err.ErrorMessage = "Order Failed Validation";

orderErrors.Add(err);

---

我需要在orderErrors填充后进行更新，就像客户列表中的OrderId一样。

我会使用字典：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<CustomerOrder> orders = new List<CustomerOrder>();
            List<OrderError> orderErrors = new List<OrderError>();

            Dictionary<string, OrderError> dictOrderErrors = orderErrors
                .GroupBy(x => x.OrderId, y => y)
                .ToDictionary(x => x.Key, y => y.FirstOrDefault());

            foreach (CustomerOrder order in orders)
            {
                order.ErrorMessage = dictOrderErrors[order.OrderId].ErrorMessage;
            }

        }
    }
    public class CustomerOrder
    {
        public string OrderId { get; set; }
        public string OrderStatus { get; set; }
        public string ErrorMessage { get; set; }
    }
    public class OrderError
    {
        public string OrderId { get; set; }
        public string ErrorMessage { get; set; }
    }
}

---

请分享你的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<CustomerOrder> orders = new List<CustomerOrder>();
            List<OrderError> orderErrors = new List<OrderError>();

            Dictionary<string, OrderError> dictOrderErrors = orderErrors
                .GroupBy(x => x.OrderId, y => y)
                .ToDictionary(x => x.Key, y => y.FirstOrDefault());

            foreach (CustomerOrder order in orders)
            {
                order.ErrorMessage = dictOrderErrors[order.OrderId].ErrorMessage;
            }

        }
    }
    public class CustomerOrder
    {
        public string OrderId { get; set; }
        public string OrderStatus { get; set; }
        public string ErrorMessage { get; set; }
    }
    public class OrderError
    {
        public string OrderId { get; set; }
        public string ErrorMessage { get; set; }
    }
}