using System;

using System.Threading;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

        var cts = new CancellationTokenSource();

        var t = Task.Factory.StartNew(() =>

        {

            while (!cts.IsCancellationRequested)

            {

                try

                {

                    Console.WriteLine("ping");

                    //Task.Delay(200,cts.Token).Wait();

                    Task.Delay(200, cts.Token).ContinueWith(x =>

                    {

                    }

​

                    , TaskContinuationOptions.OnlyOnCanceled).Wait();

                }

                catch (AggregateException ex)

                {

                    Console.WriteLine("2");

                    ex.Dump();

                }

                catch (Exception ex)

                {

                    Console.WriteLine("3");

                    Console.WriteLine(ex.InnerException.GetType());

                }

            }

        }

​

        );

        Thread.Sleep(500);

        cts.Cancel();

    }

}