How to cancel parallel loops in .NET C# z

• Cancellation token
• Parallel options

CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();

Task.Factory.StartNew(() =>
{
    Thread.Sleep();
    cancellationTokenSource.Cancel();
    Console.WriteLine("Token cancelled");
});

ParallelOptions parallelLoopOptions =
    new ParallelOptions()
    {
        CancellationToken = cancellationTokenSource.Token
    };

try
{
    Parallel.For(, Int64.MaxValue, parallelLoopOptions, index =>
    {
        double result = Math.Pow(index, );
        Console.WriteLine("Index {0}, result {1}", index, result);
        Thread.Sleep();
    });
}
catch (OperationCanceledException)
{
    Console.WriteLine("Cancellation exception caught!");
}