C#

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
            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));

            
            }

private static byte[] serialBuffer = new byte[1];
static SerialPort sPort = new SerialPort();
static void Main(string[] args)
{			
	sPort.PortName = "COM2";						
	sPort.Open();

	string data= String.Empty;
	int startNumber = 100000;
	while (startNumber < 1)
	{
		data = DateTime.Now.ToString("dd MM yy hh mm ss");
		data = data + " " + data + " " + data;

		byte[] tmp = HexStringToByteArray(data);
		sPort.Write(tmp, 0, tmp.Length);

		Thread.Sleep(500);
		startNumber--;
	}
}

private static byte[] HexStringToByteArray(string s)
{
	s = s.Replace(" ", "");
	byte[] buffer = new byte[s.Length / 2];
	for (int i = 0; i < s.Length; i += 2)
		buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16);
	return buffer;
}

SerialPort _serialPort = new SerialPort();
public Form1()
{
	InitializeComponent();
	_serialPort.PortName = "COM1";
	_serialPort.Open();
	_serialPort.DataReceived += new SerialDataReceivedEventHandler(tccuSerialPort_DataReceived);
}

byte[] serialBuffer = new byte[1];
private void tccuSerialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
	int bytesToRead = _serialPort.BytesToRead;
	if (bytesToRead > 256)
		bytesToRead = 256;

	if (bytesToRead > 0)
	{
		serialBuffer = new byte[bytesToRead];
		_serialPort.Read(serialBuffer, 0, bytesToRead);		
		listBox1.Items.Add("RECEIVED");
		_serialPort.Write(new byte[1] { 0x01 }, 0, 1);
	}
	serialBuffer = null;
}