using System;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        try{

            var cancellationToken = new CancellationTokenSource(TimeSpan.FromSeconds(3));

​

            await Program.RunWorkerAsync(cancellationToken.Token);

        }

        catch(Exception){}

        Console.WriteLine("EndedTask");

    }

    public static async Task RunWorkerAsync(CancellationToken cancellationToken) {

        while(true)

        {

            await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken);

        }

    }

}