PS1 | Serwer Echo (MultiThread)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;

namespace MultiThreadServerEcho
{
    public partial class Form1 : Form
    {
        private TcpListener tcpListener;
        private Thread listenThread;
        private bool _isRunning = false;
        delegate void SetTextCallback(string text);

        public Form1()
        {
            InitializeComponent();
            Console.WriteLine("Initialized in thread");
        }

        public int ServerStart()
        {
            var port = 7;

            try { port = int.Parse(this.portBox.Text); }
            catch (FormatException) { port = 7; }

            tcpListener = new TcpListener(IPAddress.Any, port);
            listenThread = new Thread(new ThreadStart(ListenForClients));
            listenThread.Start();
            listenThread.Join();
            _isRunning = true;
            return 0;
        }

        private void ListenForClients()
        {
            try
            {
                tcpListener.Start();
                Console.WriteLine("Listener started");
            }
            catch (SocketException e)
            {
                Console.WriteLine("Server could not start" + e.Message);
                this.SetTextOnListBox("server could not start, error of binding");
                return;
            }
            Console.WriteLine("Server runnin on port " + portBox.Text);
            this.SetTextOnListBox("server run on port ");

            while (true)
            {
                Console.WriteLine("IN while");
                TcpClient client = tcpListener.AcceptTcpClient();
                Console.WriteLine("accepted client");
                this.SetTextOnListBox("new clinect connected from: " + client.Client.RemoteEndPoint);
                Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
                clientThread.Start(client);
            }
        }

        private void HandleClientComm(object client)
        {
            TcpClient tcpClient = (TcpClient)client;
            String clientIP = "" + tcpClient.Client.RemoteEndPoint.AddressFamily;
            NetworkStream clientStream = tcpClient.GetStream();

            int size = 2014;
            byte[] message = new byte[size];
            int bytesRead;
            ASCIIEncoding encoder = new ASCIIEncoding();

            while (true)
            {
                bytesRead = 0;
                try
                {
                    bytesRead = clientStream.Read(message, 0, size);
                    clientStream.Write(message, 0, bytesRead);
                }
                catch { break; }

                if (bytesRead == 0) break;

                this.SetTextOnListBox("   Message from " + tcpClient.Client.RemoteEndPoint + ": " + encoder.GetString(message, 0, bytesRead));

            }
            tcpClient.Close();
        }


        private void SetTextOnListBox(string text)
        {
            if (this.listBox1.InvokeRequired)
            {
                this.BeginInvoke(new SetTextCallback(SetTextOnListBox), new object[] { text });
                //return 0;
            }
            else
            {
                this.listBox1.Items.Insert(0, text);
            }
        }



        private void startButton_Click(object sender, EventArgs e)
        {
            isServerRunning = !isServerRunning;

            if (isServerRunning) ServerStart();
        }

        public bool isServerRunning
        {
            get
            {
                return _isRunning;
            }
            set
            {
                _isRunning = value;
                startButton.Text = _isRunning ? "Stop" : "Start";
            }
        }
    }
}