C#HttpWebReqest - 转发POST内容？

using System;
using System.IO;
using System.Net;
using System.Text;

public class HttpWebRequestExample
{
    public static void Main()
    {
        try
        {
            string url = "https://example.com/post";
            string postData = "key1=value1&key2=value2";

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";

            byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            request.ContentLength = byteArray.Length;
            Stream dataStream = request.GetRequestStream();
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();

            WebResponse response = request.GetResponse();
            dataStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(dataStream);
            string responseFromServer = reader.ReadToEnd();

            Console.WriteLine("Response from server: " + responseFromServer);
            reader.Close();
            dataStream.Close();
            response.Close();
        }
        catch (Exception e)
        {
            Console.WriteLine("Error: " + e.Message);
        }
    }
}