如何在c#代码中创建精确的JSON格式来POST方法？

using Newtonsoft.Json;
using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

public class Program
{
    public static async Task Main(string[] args)
    {
        // 创建包含所需数据的对象
        var data = new
        {
            Name = "John",
            Age = 30,
            Email = "john@example.com"
        };

        // 将对象序列化为JSON字符串
        var json = JsonConvert.SerializeObject(data);

        // 发送POST请求
        using (var httpClient = new HttpClient())
        {
            var content = new StringContent(json, Encoding.UTF8, "application/json");
            var response = await httpClient.PostAsync("https://example.com/api", content);

            // 处理响应
            if (response.IsSuccessStatusCode)
            {
                var result = await response.Content.ReadAsStringAsync();
                Console.WriteLine(result);
            }
            else
            {
                Console.WriteLine("POST request failed.");
            }
        }
    }
}