如何在使用Elasticsearch Nest客户端和Utf8Json序列化程序时捕获与任何POCO属性不匹配的剩余JSON数据

using System;
using System.Collections.Generic;
using Utf8Json;
using Nest;

public class MyDocument
{
    public string Id { get; set; }
    public string Name { get; set; }
}

public class Program
{
    public static void Main()
    {
        var jsonString = "{\"id\":\"1\",\"name\":\"John Doe\",\"unknownField\":\"someValue\"}";

        var options = new JsonSerializerOptions
        {
            UnknownPropertyHandling = JsonUnknownPropertyHandling.Store
        };

        var dictionary = JsonSerializer.Deserialize<Dictionary<string, object>>(jsonString, options);

        var document = new MyDocument
        {
            Id = (string)dictionary["id"],
            Name = (string)dictionary["name"]
        };

        // 处理剩余的未知字段
        foreach (var key in dictionary.Keys)
        {
            if (!key.StartsWith("Id") && !key.StartsWith("Name"))
            {
                Console.WriteLine($"Unknown field: {key}, value: {dictionary[key]}");
            }
        }
    }
}