.NET 2.x Как правильно написать http запрос? - C#

import requests as r
 
def getAudio():
    response = r.post(
                    "http://vk.com/audio",
                    data = {
                        'act':"load_audios_silent",
                        "al":"1",
                        "gid":"0",
                        "id":"17738938"
                            },
                    headers = {
                        "Cookie":"remixlang=0; remixseenads=2; remixdt=0; remixsid=**************; audio_vol=96; remixflash=11.4.31"
                               }
                      )
    print response.content[0:1000]