System.Net.WebClient.UploadData C# (CSharp) Method

        public byte[] UploadData(System.Uri address, byte[] data) { throw null; }
        public byte[] UploadData(string address, string method, byte[] data) { throw null; }

        public String ExecutePost()
        {
            Random rd = new Random();
            int rd_i = rd.Next();
            String nonce = Convert.ToString(rd_i);

            String timestamp = Convert.ToString(ConvertDateTimeInt(DateTime.Now));

            String signature = GetHash(this.appSecret + nonce + timestamp);

            //ServicePointManager.ServerCertificateValidationCallback += ValidateRemoteCertificate;
            //ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;

            WebClient myWebClient = new WebClient();

            myWebClient.Headers.Add("App-Key", this.appkey);
            myWebClient.Headers.Add("Nonce", nonce);
            myWebClient.Headers.Add("Timestamp", timestamp);

            myWebClient.Headers.Add("Signature", signature);

            myWebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");

            byte[] byteArray = Encoding.UTF8.GetBytes(this.postStr);

            byte[] responseArray = myWebClient.UploadData(this.methodUrl, "POST", byteArray);

            return Encoding.UTF8.GetString(responseArray);
        }