//Fetch certificates in the currently connected card
List<X509Certificate2> cardCertificates = new List<X509Certificate2>();
try
{
    cardCertificates.AddRange(BaseSmartCardCryptoProvider.GetCertificates());
}
catch (Win32Exception ex)
{
    Console.WriteLine(ex.Message);
}

//Encrypt the message as a Base64 encoded string
string encryptedMessage = Crypto.Encrypt
(Encoding.UTF8.GetBytes(message), publicKeyExchange, RSAEncryptionPadding.OaepSHA1);
//Decrypt the Base64 encoded encrypted message
string decryptedMessage = Encoding.UTF8.GetString
(Crypto.Decrypt(encryptedMessage, privateKeyExchange, RSAEncryptionPadding.OaepSHA1));

//Sign the message into base64 string
string signedMessage = Crypto.SignData
(Encoding.UTF8.GetBytes(message), privateKeySignature, HashAlgorithmName.SHA512);
//Validate the signed message as base64 string
bool validationStatus = Crypto.VerifyData
(Encoding.UTF8.GetBytes(message), signedMessage, publicKeySignature, HashAlgorithmName.SHA512);

//Load XML document to be signed
string xmlData = File.ReadAllText(@"XMLDocuments\cd_catalog.xml");
//Sign the XML document
string signedXMLData = Crypto.SignXml(xmlData, privateKeySignature, true);
//Output the signed XML to file
File.WriteAllText(@"XMLDocuments\cd_catalog_SIGNED.xml", signedXMLData);
//Read a signed XML document
signedXMLData = File.ReadAllText(@"XMLDocuments\cd_catalog_SIGNED.xml");
//Validate the signed XML document using the embedded key in it
Console.WriteLine("Verifying XML using internal signature STATUS = " + Crypto.VerifyXml(signedXMLData));
//Validate the signed XML document using external certificate
Console.WriteLine("Verifying XML using publicKey STATUS = " + Crypto.VerifyXml(signedXMLData, publicKeySignature));

bool ocspValidationStatus = Crypto.ValidateCertificateWithOCSP(sampleCert, sampleCertIssuer);
bool crlValidationStatus = Crypto.ValidateCertificateWithCRL(sampleCert, sampleCertIssuer, true);

X509Certificate2 cert = new X509Certificate2Builder
{
    DistinguishedName = new DistinguishedNames
    {
        commonName = "Selfsigned CA",
        countryName = "KW",
        localityName = "Hawally",
        organizationalUnitName = "My Organization Unit",
        organizationName = "My Organization"
    },
    SubjectAlternativeName = new SubjectAlternativeNames
    {
        Rfc822Name = "me@example.com"
    },
    friendlyName = "My CA",
    keyPurpose = new string[] { BuilderKeyPurpose.AnyExtendedKeyUsage },
    keyUsage = BuilderKeyUsage.DigitalSignature | BuilderKeyUsage.CrlSign | BuilderKeyUsage.KeyCertSign,
    signatureAlgorithm = PKCS15SignatureAlgorithm.SHA512WITHRSA,
    NotAfter = DateTime.Now.AddYears(10)
}.Build();

X509Certificate2Builder.CSR csr = new X509Certificate2Builder
{
    DistinguishedName = new DistinguishedNames
    {
        commonName = "My CN",
        countryName = "KW",
        localityName = "Hawally",
        organizationalUnitName = "My Organization Unit",
        organizationName = "My Organization"
    },
    friendlyName = "My Friendly Name",
    keyPurpose = new string[] { },
    keyUsage = BuilderKeyUsage.DigitalSignature,
    signatureAlgorithm = PKCS15SignatureAlgorithm.SHA512WITHRSA,
    NotAfter = DateTime.Now.AddYears(10)
}.GenerateCSR();
X509Certificate2 csrPrivateKey = csr.PrivateKey;
string csrPEM = csr.CSRPEM;