using System;
using System.Threading;
using System.Threading.Tasks;

namespace CommonConsole
{
    public class Program
    {
        public static void Main()
        {
            var cancelationTokenSource = new CancellationTokenSource();
            var cancelationToken = cancelationTokenSource.Token;
            var manualResetEventSlim = new ManualResetEventSlim();

            void LongRunningTask()
            {
                Console.WriteLine("started");

                manualResetEventSlim.Wait(3000, cancelationToken);

                Console.WriteLine("stoped");
            }

            Task.Factory.StartNew(LongRunningTask);

            while (true)
            {
                var consoleKey = Console.ReadKey().Key;

                if (consoleKey == ConsoleKey.X)
                {
                    cancelationTokenSource.Cancel();
                }
                else if (consoleKey == ConsoleKey.C)
                {
                    break;
                }

                Console.WriteLine();
            }
        }
    }
}