public static string FLIPPUT(string PostData, string Url, string FlipToken, string PictureID, string Proxy)
{
    try {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
        request.Method = "PUT";
        request.Headers.Add("Accept-Language", "sv;q=1, en;q=0.9");
        request.UserAgent = "Flipagram/5.10.3 (iPhone; iOS 8.4.1; Scale/2.00)";
        request.Accept = "application/json";
        request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
        request.Headers.Add("X-Flipagram-AppVersion", "5.10.3");
        request.Headers.Add("X-Flipagram-Locale", "sv-SE");
        request.KeepAlive = true;
        request.Headers.Add("X-Flipagram-AccessToken", FlipToken);
        //request.CookieContainer = MyCookies
        byte[] bytes = Encoding.UTF8.GetBytes(PostData);
        request.ContentLength = bytes.Length;
        request.Headers.Add("X-Flipagram-ApiKey", "9d2469c1-f096-41c3-bde5-87dff002707c");
        request.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip, deflate");

        ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(HTTP.CertificateValidationCallBack);


        if (!string.IsNullOrEmpty(Proxy)) {
            Array ProxyA = Proxy.Split(":");

            if (ProxyA.Length == 2) {
                string PHost = ProxyA(0);
                int PPort = ProxyA(1);
                WebProxy WProxy = new WebProxy(PHost, PPort);

                request.Proxy = WProxy;

            } else if ((ProxyA.Length == 4)) {
                string PHost = ProxyA(0);
                int PPort = ProxyA(1);
                string PUser = ProxyA(2);
                string PPass = ProxyA(3);

                WebProxy WProxy = new WebProxy(PHost, PPort);
                WProxy.Credentials = new NetworkCredential(PUser, PPass);
                request.Proxy = WProxy;
            }
        }

        using (Stream stream = request.GetRequestStream()) {
            stream.Write(bytes, 0, bytes.Length);
        }

        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) {
            Stream responseStream = response.GetResponseStream;

            if (response.ContentEncoding.ToLower.Contains("gzip")) {
                responseStream = new GZipStream(responseStream, CompressionMode.Decompress);
            } else if (response.ContentEncoding.ToLower.Contains("deflate")) {
                responseStream = new DeflateStream(responseStream, CompressionMode.Decompress);
            }
            string HTML = new StreamReader(responseStream, Encoding.Default).ReadToEnd;
            responseStream.Close();
            response.Close();
            return HTML;
        }

    } catch (Exception Ex) {
        return Ex.Message;
    }
}