如何在C#中实现树形视图到JSON的转换

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

public class TreeNode
{
    public int Id { get; set; }
    public string Name { get; set; }
    public List<TreeNode> Children { get; set; }
}

public class TreeConverter
{
    public static string ConvertToJson(TreeNode root)
    {
        return JsonConvert.SerializeObject(root);
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        // 构建一个树形结构
        TreeNode root = new TreeNode
        {
            Id = 1,
            Name = "Root",
            Children = new List<TreeNode>
            {
                new TreeNode
                {
                    Id = 2,
                    Name = "Child 1",
                    Children = new List<TreeNode>
                    {
                        new TreeNode
                        {
                            Id = 3,
                            Name = "Grandchild 1"
                        },
                        new TreeNode
                        {
                            Id = 4,
                            Name = "Grandchild 2"
                        }
                    }
                },
                new TreeNode
                {
                    Id = 5,
                    Name = "Child 2"
                }
            }
        };

        // 转换为JSON字符串
        string json = TreeConverter.ConvertToJson(root);
        Console.WriteLine(json);
    }
}