csrfmiddlewaretoken "7e9001a3c0000f11099c11h119745e30"
username    "логин"
password    "пароль"
next    "/about/"

WebResponse Response;
HttpWebRequest Request;
Uri url = new Uri("http://00.00.00.000:0000/accounts/login/");
CookieContainer cookieContainer = new CookieContainer();

Request = (HttpWebRequest)WebRequest.Create(url);
Request.Method = "GET";
Request.CookieContainer = cookieContainer;
Response = Request.GetResponse(); //1 раз получил csrfmiddlewaretoken

string Parametros = "csrfmiddlewaretoken=" + cookieContainer.GetCookies(url)["csrftoken"].Value + "&username=логин&password=пароль&next=/about/";

Request = (HttpWebRequest)WebRequest.Create(url);
//вот тут получается мне выдадут потом новый токен, а без использования этого я не знаю как сформировать новый запрос
Request.Method = "POST";
Request.ContentType = "application/x-www-form-urlencoded";
Request.CookieContainer = cookieContainer;
Request.Headers.Add("Cookie", Response.Headers.Get("Set-Cookie"));
byte[] byteArray = Encoding.UTF8.GetBytes(Parametros);
Request.ContentLength = byteArray.Length;
Response = Request.GetResponse();

<form method="POST" action="/accounts/login/" class="well" autocomplete="off"> <div style="display:none"><input type="hidden" name="csrfmiddlewaretoken" value="7e9001a3c2801f25097c11e119745e31" /></div>

Uri url = new Uri("http://00.00.00.000:0000/accounts/login/");

CookieContainer cookieContainer = new CookieContainer();
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.Method = "GET";
httpWebRequest.CookieContainer = cookieContainer;
HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();

string Parametros = "csrfmiddlewaretoken=" + cookieContainer.GetCookies(url)["csrftoken"].Value + "&username=логин&password=пароль&next=/about/";
Console.WriteLine(Parametros);
//Paremetros "csrfmiddlewaretoken=d113dc9681a9ed800397f6164b608114&username=логин&password=пароль&next=/about/"

httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.Method = "POST";
httpWebRequest.ContentLength = Parametros.Length;
httpWebRequest.ContentType = "application/x-www-form-urlencoded";
httpWebRequest.CookieContainer = cookieContainer;
//httpWebRequest.Headers.Add("Cookie", httpWebRequest.Headers.Get("Set-Cookie"));

using (Stream stream = httpWebRequest.GetRequestStream())
{
  byte[] paramAsBytes = Encoding.Default.GetBytes(Parametros);
  stream.Write(paramAsBytes, 0, paramAsBytes.Count());
}
httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();//тут получаю 401 Несанкционированный