using System;

using System.Threading.Tasks;

using System.Threading;

public class Program

{

    public static void Main()

    {   

        CancellationTokenSource source = new CancellationTokenSource();

        CancellationToken token = source.Token;

        var task=AsyncMain(token);

        source.Cancel();

        try

        {

        Console.WriteLine("Main after started thread");

        task.Wait();

        Console.WriteLine("Main after task finished");

        }

        catch (AggregateException )

        {

        Console.WriteLine("Exceptions in Task");

        }

    }

    public static async Task AsyncMain(CancellationToken token)

    {

        Console.WriteLine("In Thread at Start");

                try

        {

        await Task.Delay(10).ContinueWith(async task =>

        {

            Console.WriteLine("Not Cancelled");

        }

                                          ,token

                                         );

                }

                    catch(TaskCanceledException)

                    {Console.WriteLine("Cancelled");}

        Console.WriteLine("In Thread after Task");

    }

}