SmtpServer.Protocol.SmtpCommandFactory.TryMakeStartTls C# (CSharp) Method

        public bool TryMakeStartTls(TokenEnumerator enumerator, out SmtpCommand command, out SmtpResponse errorResponse)
        {
            Debug.Assert(enumerator.Peek() == new Token(TokenKind.Text, "STARTTLS"));

            command = null;
            errorResponse = null;

            enumerator.Take();
            enumerator.TakeWhile(TokenKind.Space);

            if (enumerator.Count > 1)
            {
                _logger.LogVerbose("STARTTLS command can not have parameters (Tokens={0})", enumerator.Count);

                errorResponse = SmtpResponse.SyntaxError;
                return false;
            }

            command = new StartTlsCommand(_options.ServerCertificate);
            return true;
        }