public static void V_Test_X509_CertExpiresOn() { Console.WriteLine("Testing X509_CertExpiresOn ..."); string strCertName = null; string strDateTime = null; string strDateTime2 = null; string strIssuerName = null; string strCertOwner = null; strCertName = "myuser.cer"; strCertOwner = X509.CertSubjectName(strCertName, ";"); strDateTime = X509.CertIssuedOn(strCertName); strDateTime2 = X509.CertExpiresOn(strCertName); strIssuerName = X509.CertIssuerName(strCertName, ";"); Console.WriteLine($"{strCertName} issued for {strCertOwner} on {strDateTime}, expired on {strDateTime2} by {strIssuerName}"); }