Cancelling multiple tasks together by using a composite cancellation source

CompositeCancellation.cs

CancellationTokenSource source1 = new CancellationTokenSource();
CancellationTokenSource source2 = new CancellationTokenSource();
CancellationTokenSource source3 = new CancellationTokenSource();

//Composite Cancellation Source example
CancellationTokenSource compositeSource = CancellationTokenSource.CreateLinkedTokenSource(source1.Token, source2.Token, source3.Token);

//Create 3 tasks and pass token sources to different tasks and call each Start methods

//Monitor multiple task cancellation
Task waitHandleTask = new Task(() =>
{
    Console.WriteLine("Waiting for task to be cancelled.........(Press any key)");
    compositeSource.Token.WaitHandle.WaitOne();
    Console.WriteLine("Task Cancelled");
}, compositeSource.Token);

waitHandleTask.Start();

Console.ReadKey();

//Cancel any token source
source3.Cancel();