如何从.NET对象构建带有验证的表单，并在JSON核心中将其作为字典提交？

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

public class FormField
{
    [Required(ErrorMessage = "Name is required")]
    public string Name { get; set; }

    [Required(ErrorMessage = "Email is required")]
    [EmailAddress(ErrorMessage = "Invalid email address")]
    public string Email { get; set; }

    [Range(18, 99, ErrorMessage = "Age must be between 18 and 99")]
    public int Age { get; set; }
}

public class Program
{
    public static void Main()
    {
        // 创建表单对象
        var form = new FormField
        {
            Name = "John Doe",
            Email = "johndoe@example.com",
            Age = 25
        };

        // 验证表单字段
        var validationResults = new List<ValidationResult>();
        var validationContext = new ValidationContext(form);
        bool isValid = Validator.TryValidateObject(form, validationContext, validationResults, true);

        if (isValid)
        {
            // 将表单对象转换为字典
            var formDict = new Dictionary<string, object>
            {
                { "name", form.Name },
                { "email", form.Email },
                { "age", form.Age }
            };

            // 将字典对象序列化为JSON字符串
            string json = JsonConvert.SerializeObject(formDict);

            // 提交JSON数据到服务器
            // 这里使用伪代码来模拟提交过程
            SubmitForm(json);
        }
        else
        {
            // 处理表单验证失败的情况
            foreach (var validationResult in validationResults)
            {
                Console.WriteLine(validationResult.ErrorMessage);
            }
        }
    }

    public static void SubmitForm(string json)
    {
        // 在这里执行HTTP POST请求，将JSON数据提交到服务器
        // 例如使用HttpClient类或RestSharp库发送请求
        // 这里只是一个示例，实际实现需要根据具体情况进行调整
        Console.WriteLine("Submitting form: " + json);
    }
}