C#

DirectoryEntry entry = new DirectoryEntry ( LDAPServer, domainAndUsername, Password );

try
{
    // Bind to the native AdsObject to force authentication.
    Object obj = entry.NativeObject;
}
catch (Exception ex)
{
    ErrorMessage = ex.Message;
    return false;
}

//Server
 public void listenerThread()
        {
            IPHost = Dns.GetHostEntry(Dns.GetHostName());
            TcpListener tcpListener = new TcpListener(IPHost.AddressList[0], 8080);
            tcpListener.Start();
            while (true)
            {
                Socket listenerSocket = tcpListener.AcceptSocket();

                if (listenerSocket.Connected)
                {
                    lock (this)
                    {
                        alSockets.Add(listenerSocket);
                    }
                    Thread thdHandler = new Thread(new ThreadStart(handlerThread));
                    thdHandler.Start();
                }
            }
        }

        public void handlerThread()
        {
            Socket handlerSocket = (Socket)alSockets[alSockets.Count - 1];
            NetworkStream networkStream = new NetworkStream(handlerSocket);
            ntrStream = new NetworkStream(handlerSocket);
            strRead = new StreamReader(ntrStream);
            strWrite = new StreamWriter(ntrStream);

            string textFromClient = strRead.ReadLine(); 
            if (handlerSocket.Connected)
            {
                //the code
            }
        }

//Client

private void timer1_Tick(object sender, EventArgs e) //triggered every minute
        {
            connectToServer();
        }

private void connectToServer()
        {
            IPHostEntry ipHost = Dns.GetHostEntry(server);
            try
            {
                client = new TcpClient(ipHost.AddressList[0].ToString(), 8080);
                ntrStream = client.GetStream();
                streamWrite = new StreamWriter(ntrStream);

                streamYaz.WriteLine("textToServer");
                streamYaz.Flush();

                ntrStream.Close();
                streamWrite.Close();
            }
            catch (Exception)
            {
                MessageBox.Show("No Connection"); 
            }
        }

FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite, FileShare.None)

public class Vector3d {

public:

  float x, y, z;

  Vector3d() 
  {
  }
}

[NativeCppClass]
   [CLSCompliant(false)]
   public struct Vector3d
   {
   }