c# - Raise an event from within a task -

i have manager class spawns task complete long running operation. able invoke method on manager class notify listeners via event of status, errors etc.

when using non-task approach easy.

how invoke method, or raise event on manager class within task?

thanks in advance.

i define interface need communicate manager class , pass task via method parameter.

for error notifications throwing exception suffice long exception observed on task via await, task.wait(), task.result or task.exception

if notification progress there [iprogress<t>][1] interface can use.

but custom notification manager class i'd add appropriate interface , implement in manager class.