static void RequestAndBeginResponse(string url)
    {
        try
        {
        WebRequest request = WebRequest.Create(url);
        request.BeginGetResponse(new AsyncCallback(ReadWebRequestCallback), request);
        }
        catch (Exception) { }
    }

    private async static void ReadWebRequestCallback(IAsyncResult callbackResult)
    {
        WebRequest myRequest = (WebRequest)callbackResult.AsyncState;
        using (WebResponse myResponse = myRequest.EndGetResponse(callbackResult))
        {
            using (StreamReader httpwebStreamReader = new StreamReader(myResponse.GetResponseStream()))
            {
                await DownloadtheStream(httpwebStreamReader);
            }
        }
    }