Cooperative Cancellation, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
          // 1. Create the token source.
          CancellationTokenSource cts = new CancellationTokenSource();

// 2. Pass the token to the cancelable operation.
          ThreadPool.QueueUserWorkItem(new WaitCallback(DoSomeWork), cts.Token);
          Thread.Sleep(2500);

// 4. Request cancellation.
          cts.Cancel();
          Console.WriteLine("Cancellation set in token source...");
          Thread.Sleep(2500);
          // Cancellation should have happened, so call Dispose.
          cts.Dispose();
        }
        
       // 3. Thread 2: The listener
       static void DoSomeWork(object obj)
       {
          CancellationToken token = (CancellationToken)obj;

for (int i = 0; i < 100000; i++) {
             if (token.IsCancellationRequested)
             {
                Console.WriteLine("In iteration {0}, cancellation has been requested...",
                                  i + 1);
                // Perform cleanup if necessary.
                //...
                // Terminate the operation.
               break;
             }
             // Simulate some work.
             Thread.SpinWait(500000);
          }
       }
    }
    // The example displays output like the following:
    //       Cancellation set in token source...
    //       In iteration 1430, cancellation has been requested...
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 5,1 sec, cpu time: 2,61 sec, average memory usage: 24 Mb, average nr of threads: 8