using System;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        Program.MainAsync().Wait();

    }

    private static async Task MainAsync()

    {

        var cancellationTokenSource = new CancellationTokenSource();

        var token = cancellationTokenSource.Token;

        cancellationTokenSource.Cancel();

        var task = Task.Run(() => {}, token);

        try

        {

            await task;

        }

        catch(Exception ex)

        {

            Console.WriteLine(ex.ToString());

            Console.WriteLine($"Task.IsCanceled: {task.IsCanceled}");

            Console.WriteLine($"Task.IsFaulted: {task.IsFaulted}");

            Console.WriteLine($"Task.Exception: {((task.Exception == null) ? "null" : task.Exception.ToString())}");

        }

    }

}