如何在C#中使用UDP发送post请求？

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

class Program
{
    static void Main()
    {
        // 目标服务器的IP地址和端口号
        string serverIP = "127.0.0.1";
        int serverPort = 8080;

        // 构造POST请求的数据
        string postData = "key1=value1&key2=value2";

        // 将POST请求数据转换为字节数组
        byte[] postDataBytes = Encoding.UTF8.GetBytes(postData);

        // 创建TCP客户端套接字
        using (TcpClient client = new TcpClient())
        {
            // 连接到目标服务器
            client.Connect(serverIP, serverPort);

            // 获取与目标服务器通信的网络流
            NetworkStream stream = client.GetStream();

            // 发送POST请求头部
            string requestHeader = $"POST /path/to/resource HTTP/1.1\r\n" +
                                   $"Host: {serverIP}\r\n" +
                                   $"Content-Type: application/x-www-form-urlencoded\r\n" +
                                   $"Content-Length: {postDataBytes.Length}\r\n\r\n";
            byte[] requestHeaderBytes = Encoding.UTF8.GetBytes(requestHeader);
            stream.Write(requestHeaderBytes, 0, requestHeaderBytes.Length);

            // 发送POST请求数据
            stream.Write(postDataBytes, 0, postDataBytes.Length);

            // 接收服务器响应
            byte[] responseBytes = new byte[1024];
            int bytesRead = stream.Read(responseBytes, 0, responseBytes.Length);
            string response = Encoding.UTF8.GetString(responseBytes, 0, bytesRead);

            // 处理服务器响应
            Console.WriteLine(response);

            // 关闭网络流和TCP客户端套接字
            stream.Close();
            client.Close();
        }
    }
}