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.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;
using System.Text.RegularExpressions;
using System.Runtime.InteropServices;
using System.Media;
using System.Diagnostics;

namespace TwitchBot_2._0
{
    public partial class Form1 : Form
    {

        #region Variables

        private static string userName = BotnameBox.Text.ToLower();
        private static string Streamer = ChannelBox.Text.ToLower();
        #region hiddenpassword
        private static string password = OauthBox.Text.ToLower();
        #endregion

        IrcClient irc = new IrcClient("irc.chat.twitch.tv", 6667, userName, password);
        NetworkStream serverStream = default(NetworkStream);
        string readData = "";
        Thread chatThread;

        List<string> BannedWords = new List<string> { "penis", "dick", "fuck"};
        List<string> AntiChatSpamBots = new List<string> { "streamer"};
        #endregion

        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {

    }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            irc.leaveRoom();
            serverStream.Dispose();
            Environment.Exit(0);
        }

        private void getMessage()
        {
            serverStream = irc.tcpClient.GetStream();
            int buffsize = 0;
            byte[] instream = new byte[10025];
            buffsize = irc.tcpClient.ReceiveBufferSize;
            while(true)
            {
                try
                {
                    readData = irc.readMessage();
                    msg();
                }
                catch(Exception e)
                {

                }
            }
        }

        private void msg()
        {
            if (this.InvokeRequired) this.Invoke(new MethodInvoker(msg));
            else
            {
                string[] separator = new string[] { "#trolin720 :" };
                string[] singlesep = new string[] { ":","!" };

                if (readData.Contains("PRIVMSG"))
                {
                    string username = readData.Split(singlesep, StringSplitOptions.None)[1];
                    string message = readData.Split(separator, StringSplitOptions.None)[1];

                    if (BannedWordFilter(userName, message)) return;
                    if (AntiSpamBotKiller(userName, message)) return;

                    if (message[0] == '!')
                        commands(username, message);
                    chatBox.Text = chatBox.Text + username + ": " + message + Environment.NewLine;
                }

            }
        }

        private void commands(string username, string message)
        {
            string command = message.Split(new[] { ' ', '!'}, StringSplitOptions.None)[1];

            switch(command.ToLower())
            {
                case "bot":
                    irc.sendChatMessage("This bot was made by Trolin720 and will be able to be downloaded soon...");
                    break;
                case "flabs":
                    irc.sendChatMessage("Go watch Flabmania and drop him a follow at Twitch.tv/Flabmania");
                    break;
                default:
                    break;
            }
        }

        private void botMsg_TextChanged(object sender, EventArgs e)
        {
            botMsg.ForeColor = Color.White;
            if (botMsg.Text == "Send a Message...")
            {
                botMsg.ForeColor = Color.Gray;
            }
            else if (botMsg.Text == "")
            {
                botMsg.ForeColor = Color.White;
            }
            else
            {
                //idk
            }

        }

        private void botMsg_MouseHover(object sender, EventArgs e)
        {
            if (botMsg.Text == "Send a Message...")
            {
                botMsg.Text = "";
            }
            else
            {
                botMsg.Text = botMsg.Text;

            }
            botMsg.ForeColor = Color.White;
        }

        private void botMsg_MouseLeave(object sender, EventArgs e)
        {
            if (botMsg.Text == "")
            {
                botMsg.Text = "Send a Message...";
            }
            else
            {
                botMsg.Text = botMsg.Text;
            }
                botMsg.ForeColor = Color.Gray;
        }

        private void botSend_Click(object sender, EventArgs e)
        {
            irc.sendChatMessage(botMsg.Text);
            chatBox.Text = chatBox.Text + userName + ": " + botMsg.Text + Environment.NewLine;
            if (botMsg.Text == "/clear")
            {
                MessageBox.Show("Deleteing Chat...");
                chatBox.Text = "";
            }
        }

        private bool BannedWordFilter(string username, string message)
        {
            foreach(string word in BannedWords)
            {
                if (message.Contains(word))
                {
                    string command = "/timeout " + username + " 300";
                    irc.sendChatMessage(command);
                    irc.sendChatMessage(username + " that is a Banned Word.");
                    return true;
                }
            }
            return false;
        }

        private bool AntiSpamBotKiller(string username, string message)
        {
            foreach (string word in AntiChatSpamBots)
            {
                if (message.Contains(word))
                {
                    string command = "/timeout " + username + " 600";
                    irc.sendChatMessage(command);
                    return true;
                }
            }
            return false;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            irc.joinRoom(ChannelBox.Text.ToLower());
            chatThread = new Thread(getMessage);
            chatThread.Start();
        }
    }

    class IrcClient
    {
        private string userName;
        private string channel;

        public TcpClient tcpClient;
        private StreamReader inputStream;
        private StreamWriter outputStream;

        public IrcClient(string ip, int port, string userName, string password)
        {
            tcpClient = new TcpClient(ip, port);
            inputStream = new StreamReader(tcpClient.GetStream());
            outputStream = new StreamWriter(tcpClient.GetStream());

            outputStream.WriteLine("PASS " + password);
            outputStream.WriteLine("NICK " + userName);
            outputStream.WriteLine("USER " + userName + " 8 * :" + userName);
            outputStream.WriteLine("CAP REQ :twitch.tv/membership");
            outputStream.WriteLine("CAP REQ :twitch.tv/commands");
            outputStream.Flush();
        }

        public void joinRoom(string channel)
        {
            this.channel = channel;
            outputStream.WriteLine("JOIN #" + channel);
            outputStream.Flush();
        }

        public void leaveRoom()
        {
            outputStream.Close();
            inputStream.Close();
        }

        public void sendIrcMessage(string message)
        {
            outputStream.WriteLine(message);
            outputStream.Flush();
        }

        public void sendChatMessage(string message)
        {
            sendIrcMessage(":" + userName + "!" + userName + "@" + userName + ".tmi.twitch.tv PRIVMSG #" + channel + " :" + message);
        }

        public void PingResponse()
        {
            sendIrcMessage("PONG tmi.twitch.tv\r\n");
        }

        public string readMessage()
        {
            string message = "";
            message = inputStream.ReadLine();
            return message;
        }
    }

    }

RAW Paste Data
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.Net;
using System.Net.Sockets;
using System.IO;
using System.Threading;
using System.Text.RegularExpressions;
using System.Runtime.InteropServices;
using System.Media;
using System.Diagnostics;

namespace TwitchBot_2._0
{
    public partial class Form1 : Form
    {

        #region Variables

        private static string userName = BotnameBox.Text.ToLower();
        private static string Streamer;
        #region hiddenpassword
        private static string password;
        #endregion

        IrcClient irc = new IrcClient("irc.chat.twitch.tv", 6667, userName, password);
        NetworkStream serverStream = default(NetworkStream);
        string readData = "";
        Thread chatThread;

        List<string> BannedWords = new List<string> { "penis", "dick", "fuck"};
        List<string> AntiChatSpamBots = new List<string> { "streamer"};
        #endregion

        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {

    }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            irc.leaveRoom();
            serverStream.Dispose();
            Environment.Exit(0);
        }

        private void getMessage()
        {
            serverStream = irc.tcpClient.GetStream();
            int buffsize = 0;
            byte[] instream = new byte[10025];
            buffsize = irc.tcpClient.ReceiveBufferSize;
            while(true)
            {
                try
                {
                    readData = irc.readMessage();
                    msg();
                }
                catch(Exception e)
                {

                }
            }
        }

        private void msg()
        {
            if (this.InvokeRequired) this.Invoke(new MethodInvoker(msg));
            else
            {
                string[] separator = new string[] { "#trolin720 :" };
                string[] singlesep = new string[] { ":","!" };

                if (readData.Contains("PRIVMSG"))
                {
                    string username = readData.Split(singlesep, StringSplitOptions.None)[1];
                    string message = readData.Split(separator, StringSplitOptions.None)[1];

                    if (BannedWordFilter(userName, message)) return;
                    if (AntiSpamBotKiller(userName, message)) return;

                    if (message[0] == '!')
                        commands(username, message);
                    chatBox.Text = chatBox.Text + username + ": " + message + Environment.NewLine;
                }

            }
        }

        private void commands(string username, string message)
        {
            string command = message.Split(new[] { ' ', '!'}, StringSplitOptions.None)[1];

            switch(command.ToLower())
            {
                case "bot":
                    irc.sendChatMessage("This bot was made by Trolin720 and will be able to be downloaded soon...");
                    break;
                case "flabs":
                    irc.sendChatMessage("Go watch Flabmania and drop him a follow at Twitch.tv/Flabmania");
                    break;
                default:
                    break;
            }
        }

        private void botMsg_TextChanged(object sender, EventArgs e)
        {
            botMsg.ForeColor = Color.White;
            if (botMsg.Text == "Send a Message...")
            {
                botMsg.ForeColor = Color.Gray;
            }
            else if (botMsg.Text == "")
            {
                botMsg.ForeColor = Color.White;
            }
            else
            {
                //idk
            }

        }

        private void botMsg_MouseHover(object sender, EventArgs e)
        {
            if (botMsg.Text == "Send a Message...")
            {
                botMsg.Text = "";
            }
            else
            {
                botMsg.Text = botMsg.Text;

            }
            botMsg.ForeColor = Color.White;
        }

        private void botMsg_MouseLeave(object sender, EventArgs e)
        {
            if (botMsg.Text == "")
            {
                botMsg.Text = "Send a Message...";
            }
            else
            {
                botMsg.Text = botMsg.Text;
            }
                botMsg.ForeColor = Color.Gray;
        }

        private void botSend_Click(object sender, EventArgs e)
        {
            irc.sendChatMessage(botMsg.Text);
            chatBox.Text = chatBox.Text + userName + ": " + botMsg.Text + Environment.NewLine;
            if (botMsg.Text == "/clear")
            {
                MessageBox.Show("Deleteing Chat...");
                chatBox.Text = "";
            }
        }

        private bool BannedWordFilter(string username, string message)
        {
            foreach(string word in BannedWords)
            {
                if (message.Contains(word))
                {
                    string command = "/timeout " + username + " 300";
                    irc.sendChatMessage(command);
                    irc.sendChatMessage(username + " that is a Banned Word.");
                    return true;
                }
            }
            return false;
        }

        private bool AntiSpamBotKiller(string username, string message)
        {
            foreach (string word in AntiChatSpamBots)
            {
                if (message.Contains(word))
                {
                    string command = "/timeout " + username + " 600";
                    irc.sendChatMessage(command);
                    return true;
                }
            }
            return false;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            irc.joinRoom(ChannelBox.Text.ToLower());
            chatThread = new Thread(getMessage);
            chatThread.Start();
        }
    }

    class IrcClient
    {
        private string userName;
        private string channel;

        public TcpClient tcpClient;
        private StreamReader inputStream;
        private StreamWriter outputStream;

        public IrcClient(string ip, int port, string userName, string password)
        {
            tcpClient = new TcpClient(ip, port);
            inputStream = new StreamReader(tcpClient.GetStream());
            outputStream = new StreamWriter(tcpClient.GetStream());

            outputStream.WriteLine("PASS " + password);
            outputStream.WriteLine("NICK " + userName);
            outputStream.WriteLine("USER " + userName + " 8 * :" + userName);
            outputStream.WriteLine("CAP REQ :twitch.tv/membership");
            outputStream.WriteLine("CAP REQ :twitch.tv/commands");
            outputStream.Flush();
        }

        public void joinRoom(string channel)
        {
            this.channel = channel;
            outputStream.WriteLine("JOIN #" + channel);
            outputStream.Flush();
        }

        public void leaveRoom()
        {
            outputStream.Close();
            inputStream.Close();
        }

        public void sendIrcMessage(string message)
        {
            outputStream.WriteLine(message);
            outputStream.Flush();
        }

        public void sendChatMessage(string message)
        {
            sendIrcMessage(":" + userName + "!" + userName + "@" + userName + ".tmi.twitch.tv PRIVMSG #" + channel + " :" + message);
        }

        public void PingResponse()
        {
            sendIrcMessage("PONG tmi.twitch.tv\r\n");
        }

        public string readMessage()
        {
            string message = "";
            message = inputStream.ReadLine();
            return message;
        }
    }
}