I tried to work with Cancellationtoken but it wont work

So basically I tried following some Tutorials und examples on how to cancel an Task. I understand, that you need a CancellationTokenSource token out of which you can extract a token that you need as an parameter (CancellationToken token) for the Task you want to stop My problem is: when i press the "cancel"Button nothing… Read More I tried to work with Cancellationtoken but it wont work