public  string SendGetRequest(string baseurl, string parameters)        {            string parassb = parameters;                        if (parassb.Length > 0)            {                baseurl += "?" + parassb;            }            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(baseurl);            req.Method = "GET";            req.ContinueTimeout = 1000;            string result = String.Empty;            using (StreamReader reader = new StreamReader(req.GetResponseAsync().Result.GetResponseStream()))            {                result = reader.ReadToEnd();            }            return result;        }

public async Task<string> PostRequest(string url, string parameters)        {            var request = HttpWebRequest.Create(url);            request.Method = "POST";            using (Stream result = await request.GetRequestStreamAsync())            {                byte[] bytes = Encoding.UTF8.GetBytes(parameters);                result.Write(bytes, 0, bytes.Length);            }            var response = await request.GetResponseAsync();            using (Stream stream = response.GetResponseStream())            {                using (StreamReader reader = new StreamReader(stream))                {                    string content = reader.ReadToEnd();                    return content;                }            }            return null;        }