C # - Use of A3 Certificate (Card Reader) + Windows Service

Good morning, everyone.

I created a windows service (C #) where I subscribe to NFC-es XML using the FlexDocs DLL. Using the A1 certificate everything works normally, but when using A3, the frame where I must enter the PIN does not open / appear.

I tried to inform myself via the web, on this subject and what I could raise is that the windows service does not open the frame because it has no user interaction. I then tried to pass the PIN directly, but I still could not.

I'm desperate here to ask: Is there any way to use A3 + Windows Service Certificate? So that it stays 100% automatic? Or at least pass the PIN via code ??? The goal is simple, the service monitor the coupon information in the DB and thereby generate / sign / send / fetch XML.

I will pass on all the information I have so far:

1) The card reader is from Serasa Experian , template: "Near CCID" ;

2) Using certificate A1 (installable file) worked 100%. The only difference is that I had to change the service to log in as the current user of the machine. (If possible I wish it did not have to be done, but as "system account" or "local service account" does not work the certificate):

3)ViaDebuginVisualStudio,theA3certificateopenstheframefortypingthePIN,buttestingtheinstalledservice,itdoesnotopenthePINframeandreturns:5002-Error:Connectionfailed:MessageWindowserror=[Therequestwasaborted:AsecurechannelcouldnotbecreatedforSSL/TLS.](Probablecause:TheWebServicecertificatechainaccessedortheclientcertificatethatdoesnotexistinthecurrentWindowsusercertificatestore);

4)ItriedtopassthedirectPINasexplained here , using the class" RSACryptoServiceProvider "but is giving " Access Denied ". In the code where "xxxx" = > PIN. The line of code that denied the access error = > company.X509Certificate.PrivateKey = test;:

X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
                store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);

                //if (store.Certificates.Count == 0)
                //{
                //    store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
                //    store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
                //}

                X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
                X509Certificate2Collection collection1 = (X509Certificate2Collection)collection.Find(X509FindType.FindBySubjectDistinguishedName, empresa.Certificado.ToString().Trim(), false);

                if (collection1.Count == 0)
                {
                    throw new Exception("Não é possível continuar, Certificado Digital não encontrado!");
                }
                else
                {
                    empresa.X509Certificado = collection1[0];
                }

                RSACryptoServiceProvider teste = new RSACryptoServiceProvider();

                teste = LerDispositivo("xxxx", 1, "SafeSign Standard Cryptographic Service Provider");

                empresa.X509Certificado.PrivateKey = teste;

Any help will be welcome, if you need more information, please ask me! Thank you all!