cURL : Request PUT

API
2

Lol, 10sec after i find the solution :

     public T SendRequest<T>(string urlRequest, string p_method, string p_acces_token)
    {
        Thread.Sleep(100);
        JsonSerializer js = new JsonSerializer();
        var httpWebRequest = (HttpWebRequest)WebRequest.Create(urlRequest);
        httpWebRequest.ContentType = "application/json";
        httpWebRequest.Accept = "application/vnd.twitchtv.v3+json";
        httpWebRequest.Method = p_method;
        httpWebRequest.Headers.Add("Authorization: OAuth "+p_acces_token);
        if (p_method == "PUT")
        {
            httpWebRequest.ContentLength = 0;
        }

        var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();

        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
        {
            T answer = JsonConvert.DeserializeObject<T>(streamReader.ReadToEnd());
            return answer;
        }
    }

just add to Content-Length : 0