private HttpWebRequest request;
 
 private string SendRequest(string ip, string jsonRequest, int timeout, bool isOpen, string path, out string errorMessage)
 {
 string host = "https://" + jsonrpcServerIP + ":" + portNumber;
 Uri target = new Uri(host);

 try
 {
     request = (HttpWebRequest)WebRequest.Create(ip);


     ServicePointManager.Expect100Continue = true;
     ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
     ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications);

     if (!isOpen)
     {
         request.CookieContainer = new CookieContainer();
         request.CookieContainer.Add(new Cookie("sysauth", token, path, target.Host));
     }
     request.ContentType = "application/json";
     request.Method = "POST";
     request.Timeout = timeout;
     request.KeepAlive = true;

     using (var streamWriter = new StreamWriter(request.GetRequestStream()))
     {
         streamWriter.Write(jsonRequest);
         streamWriter.Flush();
         streamWriter.Close();
     }

     WebResponse response = request.GetResponse();
     using (var streamReader = new StreamReader(response.GetResponseStream()))
     {
         jsonResponse = streamReader.ReadToEnd();
     }
 }
 catch (Exception ex)
 {
     
 }
 }
 
 private bool AcceptAllCertifications(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certification, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors)
{
    if (sslPolicyErrors == SslPolicyErrors.None)
    {
        return true;
    }
    else
    {
        return false;
    }
}