Chat client erori

[SanelPandzic]

Radim Chat Client napravio sam al erore izbacuje ako moze pomoc.linija gde je eror stavit cu ispred skripte liniju.
ERRORI
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Severity   Code   Description   Project   File   Line   Suppression State
Error   CS1061   'StreamReader' does not contain a definition for 'AutoFlush' and no extension method 'AutoFlush' accepting a first argument of type 'StreamReader' could be found (are you missing a using directive or an assembly reference?)   Chat Client 0.1b   C:\Users\Sanel\Desktop\Chat Client 0.1b\Chat Client 0.1b\Form1.cs   47   Active

Severity   Code   Description   Project   File   Line   Suppression State
Error   CS1061   'StreamReader' does not contain a definition for 'WriteLine' and no extension method 'WriteLine' accepting a first argument of type 'StreamReader' could be found (are you missing a using directive or an assembly reference?)   Chat Client 0.1b   C:\Users\Sanel\Desktop\Chat Client 0.1b\Chat Client 0.1b\Form1.cs   76   Active

Severity   Code   Description   Project   File   Line   Suppression State
Error   CS0103   The name 'client_Connected' does not exist in the current context   Chat Client 0.1b   C:\Users\Sanel\Desktop\Chat Client 0.1b\Chat Client 0.1b\Form1.cs   94   Active

Severity   Code   Description   Project   File   Line   Suppression State
Error   CS0029   Cannot implicitly convert type 'System.IO.StreamWriter' to 'System.IO.StreamReader'   Chat Client 0.1b   C:\Users\Sanel\Desktop\Chat Client 0.1b\Chat Client 0.1b\Form1.cs   97   Active

Severity   Code   Description   Project   File   Line   Suppression State
Error   CS1061   'StreamReader' does not contain a definition for 'AutoFlush' and no extension method 'AutoFlush' accepting a first argument of type 'StreamReader' could be found (are you missing a using directive or an assembly reference?)   Chat Client 0.1b   C:\Users\Sanel\Desktop\Chat Client 0.1b\Chat Client 0.1b\Form1.cs   99   Active
[/pawn]
ev skripta
[pawn]
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;


namespace Chat_Client_0._1b
{
    public partial class Form1 : Form
    {
        private TcpClient client;
        public StreamReader STR;
        public StreamReader STW;
        public string receive;
        public String text_to_send;

        public Form1()
        {
            InitializeComponent();

            IPAddress[] localIP = Dns.GetHostAddresses(Dns.GetHostName());
            foreach (IPAddress address in localIP)
            {
                if(address.AddressFamily == AddressFamily.InterNetwork)
                {
                    textBox3.Text = address.ToString();
                }
            }
        }

        private void button2_Click(object sender, EventArgs e)  ////START SERVER
        {
            TcpListener listener = new TcpListener(IPAddress.Any, int.Parse(textBox4.Text));
            listener.Start();
            client = listener.AcceptTcpClient();
            STR = new StreamReader(client.GetStream());
           46:  STW = new StreamWriter(client.GetStream());
           47: STW.AutoFlush = true;

            backgroundWorker1.RunWorkerAsync();                           // start receiving data in background
            backgroundWorker2.WorkerSupportsCancellation = true;          // Abillity to cancel this thread


        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)  ///reseive data
        {
            while(client.Connected)
            {
                try
                {
                    receive = STR.ReadLine();
                    this.textBox2.Invoke(new MethodInvoker(delegate () { textBox2.AppendText("On : " + receive + "\n"); }));
                    receive = "";
                }
                catch (Exception x)
                {
                    MessageBox.Show(x.Message.ToString());
                }
            }
        }

        private void backgroundWorker2_DoWork(object sender, DoWorkEventArgs e)   ////send data
        {
            if (client.Connected)
            {
                76: STW.WriteLine(text_to_send);
                this.textBox2.Invoke(new MethodInvoker(delegate () { textBox2.AppendText("Me : " + text_to_send + "\n"); }));
            }
            else
            {
                MessageBox.Show("Send failed");
            }
            backgroundWorker2.CancelAsync();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            client = new TcpClient();
            IPEndPoint IP_End = new IPEndPoint(IPAddress.Parse(textBox5.Text), int.Parse(textBox6.Text));

            try
            {
                client.Connect(IP_End);
               94: if (client_Connected)
                {
                    textBox2.AppendText("Connected to Server" + "\n");
                    97: STW = new StreamWriter(client.GetStream());
                    STR = new StreamReader(client.GetStream());
                   99: STW.AutoFlush = true;

                    backgroundWorker1.RunWorkerAsync();                        // Start receiving Data in background
                    backgroundWorker2.WorkerSupportsCancellation = true;       // Abillity to cancel this thread
                }
            }catch (Exception x)
            {
                MessageBox.Show(x.Message.ToString());
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if(textBox1.Text != "")
            {
                text_to_send = textBox1.Text;
                backgroundWorker2.RunWorkerAsync();
            }
            textBox1.Text = "";
        }
    }
}
[/pawn]

[SanelPandzic]

moze neko pomoc?