using System;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        CancellationTokenSource cts = new CancellationTokenSource(5);

        // Thread.Sleep(10); // uncomment for task cancellation behavior

        Task.Run(() => 

        {

            for (int i = 0; i < 5; i++) {

                Console.WriteLine("Test");

                Thread.Sleep(20);

            }

        }, cts.Token).Wait();

        Console.WriteLine("Hello World");

    }

}