如何在WebClient上记录“真正的”Http头？

using System;
using System.Net;

class Program
{
    static void Main()
    {
        // 创建HttpWebRequest对象
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://example.com");

        // 添加或修改请求头信息
        request.Headers.Add("User-Agent", "MyCustomUserAgent");
        request.Headers.Set("X-Custom-Header", "CustomValue");

        // 发送HTTP请求并获取响应
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();

        // 获取响应头信息
        WebHeaderCollection headers = response.Headers;
        foreach (string key in headers.AllKeys)
        {
            Console.WriteLine("{0}: {1}", key, headers[key]);
        }

        // 关闭响应
        response.Close();
    }
}