Переписать код с WinForms на WindowsPhone 8 (WebRequest)

        public static string SendRequest(string Url, Method method)
        {
            WebRequest wc = WebRequest.Create(Url);
            wc.Method = method.ToString();
            WebResponse wr = wc.GetResponse();
            Stream receiveStream = wr.GetResponseStream();
            StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);
            string json = readStream.ReadToEnd();
 
            receiveStream.Close();
            readStream.Close();
            wr.Close();
 
            readStream.Dispose();
            receiveStream.Dispose();
 
            return json;
        }

 public async static Task<string> CallService(string serviceUrl, string method)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceUrl);
 
            request.Method = method;
 
            byte[] buffer = Encoding.UTF8.GetBytes(message);
 
            using (Stream requestStream = await request.GetRequestStreamAsync())
            {
                await requestStream.WriteAsync(buffer, 0, buffer.Length);
                await requestStream.FlushAsync();
            }
 
            string result = null;
            using (WebResponse response = await request.GetResponseAsync())
            using (Stream responseStream = response.GetResponseStream())
            using (StreamReader reader = new StreamReader(responseStream))
            {
                result = reader.ReadToEnd();
            }
 
            return result;
        }