c#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text.RegularExpressions;

namespace testCsharp
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }

        int port;
        string buf;
        string nick;
        string oauth;
        string server;
        string chan;
        System.Net.Sockets.TcpClient sock = new System.Net.Sockets.TcpClient();
        System.IO.TextReader input;
        System.IO.TextWriter output;

        Dictionary<string, string> colorDictionary = new Dictionary<string, string>();
        public static string GetBetween(string input, string before, string after)
        {
            return Regex.Split(Regex.Split(input, before)[1], after)[0];
        }

        private void Button1_Click(object sender, EventArgs e)
        {
            if (TextBox2.Text.Length < 1 | TextBox3.Text.Length < 1)
            {
                RichTextBox1.Clear();
                RichTextBox1.AppendText("Twitch name or token cannot be empty." + Environment.NewLine);
            }
            else
            {
                nick = TextBox2.Text;
                oauth = TextBox3.Text;
                Thread thread = new Thread(new ThreadStart(WorkThreadFunction));
                thread.Start();

                TextBox2.Clear();
                TextBox3.Clear();
            }
        }

        public void WorkThreadFunction()
        {
            try
            {
                //Get nick, owner, server, port, and channel from user

                //Connect to irc server and get input and output text streams from TcpClient.

                //Starting USER and NICK login commands

                //Process each line received from irc server

                //Display received irc message
                //Console.WriteLine(buf);

                //Send pong reply to any ping messages

                // IRC commands come in one of these formats:
                //                     * :NICK!USER@HOST COMMAND ARGS ... :DATA\r\n
                //                     * :SERVER COMAND ARGS ... :DATA\r\n
                //


                //After server sends 001 command, we can set mode to bot and join a channel
                server = "irc.twitch.tv";
                port = 6667;
                chan = "aphromoo";
                sock.Connect(server, port);
                if (!sock.Connected)
                {

                    this.Invoke(new MethodInvoker(() => { RichTextBox1.AppendText("Failed to connect!" + Environment.NewLine); }));
                    return;
                }
                input = new System.IO.StreamReader(sock.GetStream());
                output = new System.IO.StreamWriter(sock.GetStream());
                output.Write("USER " + nick + " 0 * " + '\r' + '\n' + "PASS " + oauth + '\r' + '\n' + "NICK " + nick + '\r' + '\n');
                output.WriteLine("TWITCHCLIENT 1");
                output.Flush();
                buf = input.ReadLine();
                while (true)
                {
                    try
                    {
                        if (!buf.Contains("#aphromoo :"))
                        {
                            this.Invoke(new MethodInvoker(() =>
                            {
                                RichTextBox1.AppendText(buf + Environment.NewLine);

                                Dictionary<string, string> colorDictionary = new Dictionary<string, string>();
                                if (buf.ToString().Contains(":USERCOLOR"))
                                {
                                    string name = GetBetween(buf.ToString(), "USERCOLOR", "#");
                                    string color = buf.ToString().Split('#')[1];
                                    if (colorDictionary.ContainsKey(name) == false)
                                    {
                                        colorDictionary.Add(name, color);
                                    }
                                    else if (colorDictionary[name] != color)
                                    {
                                        colorDictionary[name] = color;
                                    }

                                    foreach (object key_loopVariable in colorDictionary.Keys)
                                    {
                                        key = key_loopVariable;
                                        ListBox1.Items.Add((key + ":") + colorDictionary[key]);
                                    }
                                }

                            }));
                        }
                        else
                        {
                            try
                            {
                                this.Invoke(new MethodInvoker(() =>
                                {
                                    if (buf.ToString().Contains("@") && buf.ToString().Contains(".tmi.twitch.tv"))
                                    {
                                        RichTextBox2.AppendText(GetBetween(buf, "@", ".tmi") + ": " + buf.ToString().Split(':')[2] + Environment.NewLine);
                                    }
                                    else
                                    {
                                        RichTextBox1.AppendText(buf + Environment.NewLine);
                                    }


                                }));
                            }
                            catch (Exception generatedExceptionName)
                            {
                            }
                        }
                        if (buf.StartsWith("PING "))
                        {
                            output.Write(buf.Replace("PING", "PONG") + '\r' + '\n');
                            output.Flush();
                        }
                        if (buf[0] != ':')
                        {
                            continue;
                        }
                        if (buf.Split(' ')[1] == "001")
                        {
                            output.Write("MODE " + nick + " +B" + '\r' + '\n' + "JOIN #" + chan + '\r' + '\n');
                            output.Flush();
                        }
                        buf = input.ReadLine();
                    }
                    catch
                    {
                        RichTextBox1.Clear();
                        RichTextBox1.AppendText("Could not connect to chat." + Environment.NewLine);
                        break; // TODO: might not be correct. Was : Exit While
                    }
                }
            }
            catch (Exception ex)
            {
                // log errors
            }
           }

        public static void AppendText(RichTextBox box, string text, Color color)
        {
            box.SelectionStart = box.TextLength;
            box.SelectionLength = 0;

            box.SelectionColor = color;
            box.AppendText(text);
            box.SelectionColor = box.ForeColor;
        }

        private void TextBox1_KeyDown(object sender, KeyEventArgs e)
        {
            if (sock.Connected == true)
            {
                if (e.KeyCode == Keys.Enter)
                {
                    output.WriteLine("PRIVMSG #" + chan + " :" + TextBox1.Text);
                    output.Flush();
                    TextBox1.Clear();
                }
            }
            else
            {
                if (e.KeyCode == Keys.Enter)
                {
                    RichTextBox1.Clear();
                    RichTextBox1.AppendText("Not connected to chat." + '\n');
                }
            }
        }

        }

}