C#

using System;
using System.IO.Ports;

class MyClass
{
  public static void Main()
  {
    SerialPort sp = new SerialPort("COM4", 9600, Parity.None, 8, StopBits.One);
    sp.Open();

    while (true)
    {
      try
      {
        string dataReceived = sp.ReadLine();
        Console.WriteLine(dataReceived);
      }
      catch(TimeoutException)
      {
      }
    }
  }
}

using System;

class Point
{ 
    public int x, y; 
}

class FixedTest 
{
    // Unsafe method: takes a pointer to an int.
    unsafe static void SquarePtrParam (int* p) 
    {
        *p *= *p;
    }

    unsafe static void Main() 
    {
        Point pt = new Point();
        pt.x = 5;
        pt.y = 6;
        // Pin pt in place:
        fixed (int* p = &pt.x) 
        {
            SquarePtrParam (p);
        }
        // pt now unpinned
        Console.WriteLine ("{0} {1}", pt.x, pt.y);
    }
}

<br />
<asp:FileUpload runat=server /><br />