Client.handleChatInput C# (CSharp) Method

    protected void handleChatInput(String line)
    {
        if (line.Length > 0)
        {
            if (quitHelperMessageShow && (line == "q" || line == "Q"))
            {
                Console.WriteLine();
                enqueuePluginChatMessage("If you are trying to quit, use the /quit command.", true);
                quitHelperMessageShow = false;
            }

            if (line.ElementAt(0) == '/')
            {
                String line_lower = line.ToLower();

                if (line_lower == "/quit")
                {
                    intentionalConnectionEnd = true;
                    endSession = true;
                    sendConnectionEndMessage("Quit");
                }
                else if (line_lower == "/crash")
                {
                    Object o = null;
                    o.ToString();
                }
                else if (line_lower == "/ping")
                {
                    if (!pingStopwatch.IsRunning)
                    {
                        sendMessageTCP(KLFCommon.ClientMessageID.PING, null);
                        pingStopwatch.Start();
                    }
                }
                else if (line_lower.Length > (KLFCommon.SHARE_CRAFT_COMMAND.Length + 1)
                    && line_lower.Substring(0, KLFCommon.SHARE_CRAFT_COMMAND.Length) == KLFCommon.SHARE_CRAFT_COMMAND)
                {
                    //Share a craft file
                    String craft_name = line.Substring(KLFCommon.SHARE_CRAFT_COMMAND.Length + 1);
                    byte craft_type = 0;
                    String filename = findCraftFilename(craft_name, ref craft_type);

                    if (filename != null && filename.Length > 0)
                    {
                        try
                        {
                            byte[] craft_bytes = File.ReadAllBytes(filename);
                            sendShareCraftMessage(craft_name, craft_bytes, craft_type);
                        }
                        catch
                        {
                            enqueueTextMessage("Error reading craft file: " + filename);
                        }
                    }
                    else
                        enqueueTextMessage("Craft file not found: " + craft_name);
                }

            }
            else
            {
                sendTextMessage(line);
            }
        }
    }