C# - Kommunikation übers Netzwerk

// Listener initialisieren
		TcpListener listener = new TcpListener(IPAddress.Parse("127.0.0.1"), 4711);
		private TcpClient client;




		private void Verbinden()
		{
			// Listener starten
			listener.Start();




			// Warten bis ein Client die Verbindung wünscht
			client = listener.AcceptTcpClient();
		}




		private void Empfangen()
		{
			// Funktion für Empfang
		}










		private void Senden(string text)
		{
			StreamWriter STW = new StreamWriter(client.GetStream());
			STW.AutoFlush = true;
			// Hier kann in den Stream geschrieben werden
			// oder aus dem Stream gelesen werden
			STW.WriteLine(text);
		}




		public frmServer()
		{
			InitializeComponent();
		}




		private void btnServerStarten_Click(object sender, EventArgs e)
		{
			backgroundWorker1.RunWorkerAsync();
			bwrStatus.RunWorkerAsync();
			Empfangen();
		}




		private void frmServer_FormClosed(object sender, FormClosedEventArgs e)
		{
			// Listener beenden
			listener.Stop();
		}




		private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
		{
			Verbinden();			
		}




		private void btnSenden_Click(object sender, EventArgs e)
		{
			Senden(txtSenden.Text);
		}
	}

private void Verbinden(string IP_Adresse)
		{
			try
			{
				//ChatClient.Connect(IP_Endpunkt);
				//ChatClient.Connect(IPAddress.Parse("127.0.0.1"), 4711);
				ChatClient.Connect(IPAddress.Parse(IP_Adresse), 4711);
				//Senden();
				backgroundWorker1.RunWorkerAsync();
			}
			catch(Exception e)
			{
				MessageBox.Show(e.Message.ToString());
			}




		}




		private void Senden(String text = "Hallo Welt")
		{
			StreamWriter STW = new StreamWriter(ChatClient.GetStream());
			STW.WriteLine(text);
		}




		private void Empfangen()
		{
			StreamReader STR = new StreamReader(ChatClient.GetStream());
			txtText.Text = 	STR.ReadLine();
		}




		TcpClient ChatClient = new TcpClient();







		public client()
		{
			InitializeComponent();
		}




		private void chkVerbinden_CheckedChanged(object sender, EventArgs e)
		{
			if (chkVerbinden.Checked)
			{
				Verbinden(txtIPAdresse.Text);
			}
			else
			{




			}
		}




		private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
		{

		}