/// <summary>
 /// Returns if a self signed certificate is properly signed.
 /// </summary>
 private static bool IsSignatureValid(X509Certificate2 cert)
 {
     Org.BouncyCastle.X509.X509Certificate bcCert = new Org.BouncyCastle.X509.X509CertificateParser().ReadCertificate(cert.RawData);
     try
     {
         bcCert.Verify(bcCert.GetPublicKey());
     }
     catch
     {
         return(false);
     }
     return(true);
 }