问Dialogflow v2 -发出不带任何库的REST API请求

EN

 dynamic results;
    string url = @"https://api.dialogflow.com/v1/intents/<intentId>";

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    request.Headers.Add(HttpRequestHeader.Authorization, "Bearer <your dialogflow developer key>");

    try
    {
        WebResponse response = request.GetResponse();
        using (Stream responseStream = response.GetResponseStream())
        {
            StreamReader reader = new StreamReader(responseStream, System.Text.Encoding.UTF8);
            var restResponse = reader.ReadToEnd();
            results = JsonConvert.DeserializeObject<dynamic>(restResponse);
    }
    catch (WebException ex)
    {
        WebResponse errorResponse = ex.Response;
        using (Stream responseStream = errorResponse.GetResponseStream())
        {
            StreamReader reader = new StreamReader(responseStream, System.Text.Encoding.GetEncoding("utf-8"));
            String errorText = reader.ReadToEnd();
        }
        throw;
    }