System.Net.Security.SecureChannel.CreateFatalHandshakeAlertToken C# (CSharp) Method

        public ProtocolToken CreateFatalHandshakeAlertToken(SslPolicyErrors sslPolicyErrors, X509Chain chain)
        {
            if (NetEventSource.IsEnabled) NetEventSource.Enter(this);

            TlsAlertMessage alertMessage;

            switch (sslPolicyErrors)
            {
                case SslPolicyErrors.RemoteCertificateChainErrors:
                    alertMessage = GetAlertMessageFromChain(chain);
                    break;
                case SslPolicyErrors.RemoteCertificateNameMismatch:
                    alertMessage = TlsAlertMessage.BadCertificate;
                    break;
                case SslPolicyErrors.RemoteCertificateNotAvailable:
                default:
                    alertMessage = TlsAlertMessage.CertificateUnknown;
                    break;
            }

            if (NetEventSource.IsEnabled) NetEventSource.Info(this, $"alertMessage:{alertMessage}");

            SecurityStatusPal status;
            status = SslStreamPal.ApplyAlertToken(ref _credentialsHandle, _securityContext, TlsAlertType.Fatal, alertMessage);

            if (status.ErrorCode != SecurityStatusPalErrorCode.OK)
            {
                if (NetEventSource.IsEnabled) NetEventSource.Info(this, $"ApplyAlertToken() returned {status.ErrorCode}");

                if (status.Exception != null)
                {
                    throw status.Exception;
                }

                return null;
            }

            ProtocolToken token = GenerateAlertToken();
            if (NetEventSource.IsEnabled) NetEventSource.Exit(this, token);
            return token;
        }