C#

//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
   {
   }

private void button2_Click(object sender, EventArgs e)
            {

	    // ToolStripMenuItem.Visible always returns false?
            // This has the effect of not being able to toggle or invert the state to false by
            // assigning its negated value by use of the ! operator.
            // If the initial state is Visible = false the first click will toggle to Visible = true
            // Subsequent clicks do not change the Visible property as Visible always returns false
            // So, no matter the true state it will always set Visible = true rather than the inverse;
            

            // always returns false even if set to Visible = True
            bool cond1 = this.confirmDeletesToolStripMenuItem.Visible; 

            // always returns true
            bool cond2 = !this.confirmDeletesToolStripMenuItem.Visible; 

            MessageBox.Show(string.Format("Cond1 = {0} Cond2 = {1}",cond1,cond2));

            // try to invert the value of confirmDeletesToolStripMenuItem.Visible 
            this.confirmDeletesToolStripMenuItem.Visible = !this.confirmDeletesToolStripMenuItem.Visible;

            // still always returns false
            cond1 = this.confirmDeletesToolStripMenuItem.Visible; 

            // still always returns true
            cond2 = !this.confirmDeletesToolStripMenuItem.Visible; 

            MessageBox.Show(string.Format("Cond1 = {0} Cond2 = {1}", cond1, cond2));

            
            }