How to cancel a Parallel.For and Parallel.Foreach loop – Task Parallel Library

Program.cs

using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System;
using System.Threading.Tasks;
using System.Threading;

namespace ParallelFor
{
    class Program
    {
        static void Main(string[] args)
        {
            using (CancellationTokenSource cancelToken = new CancellationTokenSource())
            {
                //Setting cancellationtoken to parallel options
                ParallelOptions options = new ParallelOptions();
                options.CancellationToken = cancelToken.Token;
                Console.WriteLine("Press 'c' to cancel.");

                //running another thread to get user cancel request
                Task.Factory.StartNew(() =>
                {
                    if (Console.ReadKey().KeyChar == 'c')
                        cancelToken.Cancel();
                });

                try
                {
                    Console.Write("Starting Parallel.For loop");
                    Parallel.For(0, 100000, options, (i) =>
                        {
                        Console.Write("{0}, ", i);
                        options.CancellationToken.ThrowIfCancellationRequested();
                        });
                }
                catch (OperationCanceledException ex)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("Parallel loop has been canceled by user");
                }
                catch (Exception e)
                {
                    throw (e);
                }
            }
            Console.ReadLine();
        }
    }
}

How to cancel a Parallel.For and Parallel.Foreach loop – Task Parallel Library