聽說讀寫

using System;
using System.Threading;
public static class Program
{
    public static void Main()
    {
        // Create a Timer object that knows to call our TimerCallback
        // method once every 2000 milliseconds.
        Timer t = new Timer(TimerCallback, null, 0, 2000);
        // Wait for the user to hit <Enter>
        Console.ReadLine();
    }
    private static void TimerCallback(Object o)
    {
        // Display the date/time when this method got called.
        Console.WriteLine("In TimerCallback: " + DateTime.Now);
        // Force a garbage collection to occur for this demo.
        GC.Collect();
    }
}