TcpClient hangs after connection to remote host & application freezes c# -

i trying establish connection remote host via ip address , port number. connection established (even verified using cmd netstat) when try close connection in code:

clientconnection.client.close(); clientconnection.client.dispose(); clientconnection.close(); 

the program crashes because socket not have available data read client stream. in windows application (client) have button click call connecttofalcon method , calls readstream method. please let me know have been going wrong.

  public void readstream(object argument)     {              clientconnection = (tcpclient)argument;             //tcpclient client = new tcpclient();              datetime start_time = datetime.now;             timespan delay = new timespan(0, 0, 10);             while (clientconnection.available == 0)             {                 application.doevents();                 if (datetime.now.subtract(start_time) > delay)                     break;             }               if ((clientconnection != null) && (clientconnection.available > 0))             {                 var message = new byte[1];                 array.resize(ref message, clientconnection.available);                 //remove below 2 lines , if-statement block if program crashes                 clientconnection.client.receivetimeout = 20000; //timeout after 20 seconds                 clientconnection.sendtimeout = 20000;                 if (clientconnection.client.receivetimeout <= 20000 || clientconnection.sendtimeout == 20000)                 {                     clientconnection.client.receive(message);                     string testresult = system.text.encoding.default.getstring(message);                 }                 else                 {                     messagebox.show("time expired before read operation completed.");                 }             }             else if (((clientconnection == null) && (clientconnection.available <= 0)) || (clientconnection.connected == false))             {                 clientconnection.close();                 messagebox.show("closing client connection due insufficient amount of data available read");             }              //clientconnection.client.close();             //clientconnection.client.dispose();             //clientconnection.close();         }}     public void connecttofalcon(string ipaddress, int port)     {              clientconnection = new tcpclient();             //var result = clientconnection.beginconnect(ipaddress, port, new asynccallback(callback), clientconnection);             var result = clientconnection.beginconnect(ipaddress, port, null, null);             var success = result.asyncwaithandle.waitone(timespan.fromseconds(1));              if (success == false)             {                 messagebox.show("failed connect");             }             else             {                 messagebox.show("client connected...");                 while (true)                 {                     thread t = new thread(readstream);                     t.start(clientconnection); //a new thread spawned                     //t.start();                 }             }            } 

according @luaan, must call endconnect on iasyncresult in callback function in order acknowledge client request.`

    public void callback(iasyncresult ar)     {         this.clientconnection.endconnect(ar);     }      var result = clientconnection.beginconnect(ip, port, new asynccallback(callback), clientconnection);