c# tcp problem

V posebej razredu imam nareto vse za server in client in streamanje. Zanima me zakaj mi debuger javi napako, namreč Networkstream javi napaka oz. je NULL..tukaj je del kode:

 public void start_client()
 {
 IPAddress novip = IPAddress.Parse("127.0.0.1");
 Console.WriteLine("Povezujem ...");
 
 TcpClient odjemalec = new TcpClient();
 
 odjemalec.Connect(novip, int.Parse("1111"));
 NetworkStream networkStream = odjemalec.GetStream();
 
 
 
 
 
 Console.WriteLine("Povezan");
 /*Console.Write("Vpiši besedilo: ");
 String line = Console.ReadLine();*/
 
 }
 
 public void streamaj_client()
 {
 
 StreamReader streamReader = new StreamReader(networkStream); //TLELE JE streamreader NULL
 StreamWriter streamWriter = new StreamWriter(networkStream);
 streamWriter.WriteLine(podatki);
 Console.WriteLine("Pošiljam sporočilo...");
 streamWriter.Flush();
 string s = streamReader.ReadLine();
 
 
 
 
 Console.WriteLine("Prejemam sporočilo...");
 Console.WriteLine(s);
 
 
 }
 

Networkstream imam globalno spremenljivko.

Ja networkstream je isto nula..pač client se lahko poveže na server. potem ko stisnem v formi clienta na gumb pošlji serverjo, ta kliče to metodo streamaj_client...tlele je še koda za streamaj_server, ki jo kličem ko zaženem server..

 public void streamaj_server()
 {
 try
 {
 
 Socket socketForClient = server.AcceptSocket();
 
 Console.WriteLine("Odjemalec povezan " + socketForClient.RemoteEndPoint.ToString());
 NetworkStream networkStream = new NetworkStream(socketForClient);
 StreamWriter streamWriter = new StreamWriter(networkStream);
 StreamReader streamReader = new StreamReader(networkStream);
 podatki = streamReader.ReadLine();
 Console.WriteLine("Sprejeto: " + podatki);
 //textBox1.Text = line;
 streamWriter.WriteLine(podatki);
 Console.WriteLine("Poslano: " + podatki);
 
 streamWriter.Flush();
 Console.WriteLine();
 
 
 
 
 socketForClient.Close();
 
 
 }
 catch (Exception x)
 {
 Console.WriteLine("Error..... " + x.StackTrace);
 }
 }
 

Koda za start serverja:

 public void start_server()
 {
 ip = IPAddress.Parse("127.0.0.1");
 server = new TcpListener(ip, int.Parse("1111"));
 server.Start();
 
 
 }
 

Ne vm ka bi lahk blo narobe??

Neki me zanima..recim da v server form load zaženem server in začnem streamanje preko socketov...kot je tlele

 private void server_Load(object sender, EventArgs e)
 {
 Int32 port = 1111;
 IPAddress localAddr = IPAddress.Parse("127.0.0.1");
 
 TcpListener myList = new TcpListener(localAddr, port);
 myList.Start();
 Console.WriteLine("Strežnik pognan"); 
 
 
 try
 {
 
 
 
 
 Socket socketForClient = myList.AcceptSocket();
 
 Console.WriteLine("Odjemalec povezan " + socketForClient.RemoteEndPoint.ToString());
 NetworkStream networkStream = new NetworkStream(socketForClient);
 StreamWriter streamWriter = new StreamWriter(networkStream);
 StreamReader streamReader = new StreamReader(networkStream);
 line = streamReader.ReadLine();
 Console.WriteLine("Sprejeto: " + line);
 textBox1.Text = line;
 streamWriter.WriteLine(line);
 Console.WriteLine("Poslano: " + line);
 
 streamWriter.Flush();
 Console.WriteLine();
 
 
 
 }
 catch (Exception x)
 {
 Console.WriteLine("Error..... " + x.StackTrace);
 } 
 }
 

Zei pa za vsako streamanje, ko hočem poslat recim nek fajl iz clienta mi prvič pošlje drugič pa ne...tlele mam kodo za pošiljanje

 private void poslji()
 {
 
 
 if (comboBox1.SelectedIndex == 0) novo = "1";
 if (comboBox1.SelectedIndex == 1) novo="2";
 
 
 NetworkStream networkStream = odjemalec.GetStream();
 StreamReader streamReader = new StreamReader(networkStream);
 StreamWriter streamWriter = new StreamWriter(networkStream);
 streamWriter.WriteLine(novo);
 Console.WriteLine("Pošiljam sporočilo...");
 streamWriter.Flush();
 string s = streamReader.ReadLine();
 
 
 textBox1.Text = s;
 
 Console.WriteLine("Prejemam sporočilo...");
 Console.WriteLine(s);
 
 
 
 }
 

Zei me zanima a morem za vsak podatek, ki ga pošljem zapreti streamwriter, streamreader in networkstream..ker mi namreč v obeh primerih v drugo ne dela?