Meebey.SmartIrc4net.IrcConnection._SimpleParser C# (CSharp) Method

        private void _SimpleParser(object sender, ReadLineEventArgs args)
        {
            string   rawline = args.Line;
            string[] rawlineex = rawline.Split(new char[] {' '});
            string   messagecode = "";

            if (rawline[0] == ':') {
                messagecode = rawlineex[1];

                ReplyCode replycode = ReplyCode.Null;
                try {
                    replycode = (ReplyCode)int.Parse(messagecode);
                } catch (FormatException) {
                }

                if (replycode != ReplyCode.Null) {
                    switch (replycode) {
                        case ReplyCode.Welcome:
                            _IsRegistered = true;
            #if LOG4NET
                            Logger.Connection.Info("logged in");
            #endif
                            break;
                    }
                } else {
                    switch (rawlineex[1]) {
                        case "PONG":
                            DateTime now = DateTime.UtcNow;
                            _LastPongReceived = now;
                            _Lag = now - _LastPingSent;

            #if LOG4NET
                            Logger.Connection.Debug("PONG received, took: "+_Lag.TotalMilliseconds+" ms");
            #endif
                            break;
                    }
                }
            } else {
                messagecode = rawlineex[0];
                switch (messagecode) {
                    case "ERROR":
                        IsConnectionError = true;
                    break;
                }
            }
        }