using System;

using System.Threading;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var cts = new CancellationTokenSource();

        cts.Token.Register(OnCancel);

        Console.WriteLine("Setting timeout to 1 seconds "+ DateTime.Now);

        cts.CancelAfter(1000);

        Console.WriteLine("Setting timeout to 1 second "+ DateTime.Now);

        cts.CancelAfter(2000);

        Thread.Sleep(4000);

    }

    public static void OnCancel()

    {

        Console.WriteLine("Cancel event" + DateTime.Now);

    }

}