AskQuestion-Making the call

gistfile1.txt

public string AskQuestion(string question)
{
    string answers = null;
    string data = "{\"question\" : { \"evidenceRequest\":{\"profile\":\"NO\"},\"questionText\" : \"" + question + "\"}}";
    var qaCall = (HttpWebRequest)WebRequest.Create(url);
    try
    {
        string auth = string.Format("{0}:{1}", this.uid, this.pwd);
        string auth64 = Convert.ToBase64String(Encoding.ASCII.GetBytes(auth));
        string credentials = string.Format("{0} {1}", "Basic", auth64);
        qaCall.Headers[HttpRequestHeader.Authorization] = credentials;
        qaCall.Method = "POST";
        qaCall.Accept = "application/json";
        qaCall.ContentType = "application/json";
        qaCall.Headers["X-SyncTimeOut"] = "30";
        var encoding = new UTF8Encoding();
        var payload = Encoding.GetEncoding("iso-8859-1").GetBytes(data);
        qaCall.ContentLength = payload.Length;
        using (var callStream = qaCall.GetRequestStream())
        {
            callStream.Write(payload, 0, payload.Length);
        }
    }
    catch (Exception e)
    {
        Console.Out.WriteLine("error:" + e.Message);
        Console.ReadKey();
    }