Task.Run and CancellationToken. How does cancellation work in this case?

Question

.NET

Hello. Why will the task end up with a different status in the following two cases? Considering that
token.IsCancellationRequested = true. Why does the functionality change if, in fact, the equivalent of if (true) is written there?

1. Here Status = Canceled

CancellationTokenSource cts = new CancellationTokenSource(1);
            var token = cts.Token;
            var task = Task.Run(() =>
            {
                    Thread.Sleep(5);
                    // if(token.IsCancellationRequested)
                    throw new OperationCanceledException(token);
            });

            Thread.Sleep(50);
            Console.WriteLine(task.Status);

2. Faulted will be here.

CancellationTokenSource cts = new CancellationTokenSource(1);
            var token = cts.Token;
            var task = Task.Run(() =>
            {
                Thread.Sleep(5); 
                if(token.IsCancellationRequested) // true
                    throw new OperationCanceledException(token);
            });

            Thread.Sleep(50);
            Console.WriteLine(task.Status);

UPD: Interestingly, in the first case, even if you do not pass a unit to the CancellationTokenSource constructor, it will still be Status = Canceled.

Answer 1

Found the answer here .