70B43r

According to [MS Docs for X509Certificate2.PrivateKey](https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.x509certificates.x509certificate2.privatekey?view=net-6.0) PrivateKey-Property is/becomes obsolete and therefore does not provide data anymore. Instead [RSACertificateExtensions.GetRSAPrivateKey](https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.x509certificates.rsacertificateextensions.getrsaprivatekey?view=net-6.0) should be used.