C# dsik kom cl

using System;
using System.IO;
using System.Threading;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace DSIKKomunikator
{
    public partial class Form2 : Form
    {
        private void Form2_Load(object sender, EventArgs e)
        {

        }
        private void ChatBox_TextChanged(object sender, EventArgs e)
        {

        }
        private void Form2_FormClosing(object sender, FormClosingEventArgs e)
        {
        }
        private void listEmotes_ItemCheck(object sender, ItemCheckEventArgs e)
        {

        }
        public int rectime = 0;
        public Form2() //ladowanie forma
        {
            InitializeComponent();
            this.Height = 437;
            listEmotes.Height = 0;
            ConnectAsync(IPAddress.Parse(Form1.server), Form1.port);
            var lines = File.ReadLines("C:\\APP\\emotes.txt");
            foreach(var line in lines)
            {
                listEmotes.Items.Add(line);
            }
        }
        private TcpClient _tcpClient = new TcpClient();
        Task task;

        private async void ConnectAsync(IPAddress ipadress, int port) //laczenie
        {
            await _tcpClient.ConnectAsync(ipadress, port);
            ChatBox.Text += "Podłączony do serwera." + Environment.NewLine;
            task = new Task(Receive);
            task.Start();
        }
        private void SendMsg() //funkcja wysylania
        {
            byte[] toSend = Encoding.Unicode.GetBytes(Form1.username + ":" + Environment.NewLine + MsgBox.Text);
            _tcpClient.Client.Send(toSend);
            MsgBox.Text = "";
        }
        private void button1_Click(object sender, EventArgs e)//przycisk wysylania
        {
            SendMsg();
        }
        private void Receive() //odbieranie
        {
            while (true) {
                try {
                    byte[] rec = new byte[_tcpClient.ReceiveBufferSize];
                    _tcpClient.Client.Receive(rec);
                    string temp = Encoding.UTF8.GetString(rec);
                    if (temp.Contains("PNG"))
                    {
                        /*using(FileStream fileStream = new FileStream("C:\\APP\\img.png", FileMode.OpenOrCreate))
                        {
                            for(int i = 0; i < rec.Length; i++)
                            {
                                fileStream.WriteByte(rec[i]);
                            }
                        }*/
                        File.WriteAllBytes("C:\\APP\\img.png", rec);
                        RecImgBox.SizeMode = PictureBoxSizeMode.Zoom;
                        RecImgBox.ImageLocation = "C:\\APP\\img.png";
                    }
                    else
                    {
                        temp = Encoding.Unicode.GetString(rec);
                        this.Invoke((MethodInvoker)delegate { ChatBox.Text += Environment.NewLine; ChatBox.AppendText(temp); });
                    }
                    //Thread.Sleep(100);
                    //Receive();
                }
                catch (Exception e)
                {
                    Console.WriteLine("Ełoł " + e.Message);
                }
            }
        }

        private void MsgBox_KeyDown(object sender, KeyEventArgs e) //enter aby wyslac
        {
            if(e.KeyCode == Keys.Enter)
            {
                SendMsg();
            }
        }

        private void button2_Click(object sender, EventArgs e) // rozsuwanie panelu dolnego
        {
            if (this.Height < 515)
            {
                this.Height = 515;
                listEmotes.Height = 75;
            }
            else
            {
                this.Height = 437;
                listEmotes.Height = 0;
            }
        }

        private void listEmotes_ItemSelectionChanged(object sender, ListViewItemSelectionChangedEventArgs e) //wybieranie emotki
        {
            foreach (ListViewItem item in listEmotes.SelectedItems)
            {
                MsgBox.Text += item.Text;
            }
                listEmotes.SelectedItems.Clear();
        }

        private void button3_Click(object sender, EventArgs e) //otwarcie i wyslanie pliku
        {
            OpenFileDialog ofile = new OpenFileDialog();
            ofile.Filter = "PNG Files(*.png)|*.png";
            ofile.RestoreDirectory = true;
            if(ofile.ShowDialog() == DialogResult.OK)
            {
                FileInfo fi = new FileInfo(ofile.FileName);
                if(fi.Length < 64000) {
                    _tcpClient.Client.SendFile(ofile.FileName);
                }
                else
                {
                    MessageBox.Show("Plik jest za duzy! Max 64Kb");
                }
                //_tcpClient.Client.SendFile(ofile.FileName);

            }
        }

        private void button4_Click(object sender, EventArgs e) //wylogowanie
        {
            _tcpClient.Close();
            Application.Exit();

        }

        private void button5_Click(object sender, EventArgs e) //rozsuwanie panelu w bok
        {
            if(this.Width < 1107)
            {
                this.Width = 1107;
            }
            else
            {
                this.Width = 685;
            }
        }
    }
}