Json.NET：序列化后的空对象

Question

我使用Json.Net库进行血清化。

这是我的代码：

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Runtime.Serialization;

namespace ConsoleApp
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            var field1 = new Field();
            field1.ExtraFields = new Dictionary<string, JToken>();

            var field2 = new Field();
            field1.ExtraFields = new Dictionary<string, JToken>();

            var panelRow1 = new PanelRow();
            panelRow1.Fields = new List<Field>();

            var panelRow2 = new PanelRow();
            panelRow2.Fields = new List<Field>();

            var row1 = new Row();
            row1.PanelRows = new List<PanelRow>();
            row1.PanelRows.Add(panelRow1);
            row1.PanelRows.Add(panelRow2);

            var row2 = new Row();
            row2.PanelRows = new List<PanelRow>();
            row2.PanelRows.Add(panelRow1);
            row2.PanelRows.Add(panelRow2);

            var baseForm = new BaseForm();
            baseForm.Rows = new List<Row>();
            baseForm.Rows.Add(row1);
            baseForm.Rows.Add(row2);

            var result = JsonConvert.SerializeObject(baseForm, Formatting.Indented, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });

            Console.ReadKey(true);
        }
    }

    class BaseForm
    {
        [JsonProperty(PropertyName = "rows")]
        public IList<Row> Rows { get; set; }

        public bool ShouldSerializeRows()
        {
            return Rows.Count != 0;
        }
    }

    class Row
    {
        [JsonProperty(PropertyName = "panels")]
        public IList<PanelRow> PanelRows { get; set; }

        public bool ShouldSerializePanelRows()
        {
            return PanelRows.Count != 0;
        }
    }

    class PanelRow
    {
        [JsonProperty(PropertyName = "fields")]
        public IList<Field> Fields { get; set; }

        public bool ShouldSerializeFields()
        {
            return Fields.Count != 0;
        }
    }

    class Field
    {
        [JsonExtensionData]
        public IDictionary<string, JToken> ExtraFields { get; set; }

        public bool ShouldSerializeExtraFields()
        {
            return ExtraFields.Count != 0;
        }
    }
}

序列化后，我在数组中有空对象：

我在这种情况下的结果必须是这样的：

{}

因为我们在较低元素＆＃39; Field＆＃39;中没有任何信息。

如何解决该问题，从Json结果中删除空对象？

提前致谢。