Cancellation of a long running task in C#

Cancellation of a long running task in C#

I am working on a project where we have lots of separate components are
running and my agenda is to cancel the component process in between based
on user input.
For example: I have 6 windows service that do all the work and 1 another
windows service that is responsible for distribution of work. so once the
work is send to worker windows service there is no control over it. this
worker windows service do some time consuming task, calling several
function, interect with database etc. I want to cancel the task in between
of working.
The traditional approch we use for cancelation will no longer work here
as... 1. I am not iterating any loop where I can continuosly check for
Cancel flag. 2. Since the component is totally separate and once they
start working, new instance is created of that component and not able to
pass any value to that component.
Thanks in advance.