client game

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;

namespace Client
{
    public partial class frmClient : Form
    {

        byte[] sendBuffer = new byte[255];
        byte[] receiveBuffer = new byte[255];
        Socket clientSocket;

        public frmClient()
        {
            InitializeComponent();
        }

        private void btnJoin_Click(object sender, EventArgs e)// WORKS
        {
            clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            IPAddress ipAddress;
            int port;
            bool tryParseIP = IPAddress.TryParse(txtAddress.Text, out ipAddress);
            bool tryParsePort = Int32.TryParse(txtPort.Text, out port);

            if (tryParseIP == true && tryParsePort == true)
            {
                try
                {
                    IPEndPoint clientEndpoint = new IPEndPoint(ipAddress, port);
                    clientSocket.Connect(clientEndpoint);

                    sendBuffer = Encoding.ASCII.GetBytes("connected to client");
                    clientSocket.Send(sendBuffer, 0, sendBuffer.Length, 0);
                    sendBuffer = null;

                    receiveBuffer = new byte[255];
                    int receive = clientSocket.Receive(receiveBuffer, 0, receiveBuffer.Length, 0);
                    Array.Resize(ref receiveBuffer, receive);
                    lbGameState.Items.Add(Encoding.ASCII.GetString(receiveBuffer));

                    lblConnected.Text = "Connected to: " + clientSocket.RemoteEndPoint;
                    lblConnected.ForeColor = Color.Green;
                    btnJoin.Enabled = false;
                    btnLeave.Enabled = true;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "Client - Connection Error");
                }
            }
            else
            {
                MessageBox.Show("You did not enter a valid port number or IP address, please try again.", "Error: connect to server not established", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void btnLeave_Click(object sender, EventArgs e)// WORKS
        {
            clientSocket.Close();
            lblConnected.Text = "Disconnected";
            lblConnected.ForeColor = Color.Red;
            btnJoin.Enabled = true;
            btnLeave.Enabled = false;
        }

        private void btnGuess_Click(object sender, EventArgs e)// WORKS
        {
            int guess;
            int receive;
            bool tryParseGuess = Int32.TryParse(txtNumber.Text, out guess);

            if (tryParseGuess == true && guess <= 10 && guess > 0)
            {
                try
                {
                    sendBuffer = new byte[255];
                    sendBuffer = Encoding.ASCII.GetBytes(txtNumber.Text);

                    clientSocket.Send(sendBuffer, 0, sendBuffer.Length, 0);

                    receiveBuffer = new byte[255];
                    receive = clientSocket.Receive(receiveBuffer, 0, receiveBuffer.Length, 0);
                    Array.Resize(ref receiveBuffer, receive);
                    lbGameState.Items.Add(Encoding.ASCII.GetString(receiveBuffer));

                    receiveBuffer = new byte[255];
                    receive = clientSocket.Receive(receiveBuffer, 0, receiveBuffer.Length, 0);
                    Array.Resize(ref receiveBuffer, receive);
                    lbGameState.Items.Add(Encoding.ASCII.GetString(receiveBuffer));
                }
                catch (SocketException)
                {
                    clientSocket.Close();
                }
            }
            else
            {
                MessageBox.Show("Enter a valid number between 1 and 100", "Error - valid number not entered", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void frmClient_FormClosing(object sender, FormClosingEventArgs e)// WORKS
        {
                //clientSocket.Close();
        }
    }
}