I want to notify my class's event subscribers without delay and simultaneously.
Should I roll my own event handler; use some from FCL supporting parallelism; or default built-in System.EventHandler<T> support such way of event notification?
You can use MulticastDelegate.GetInvocationList for any delegate, and then just invoke all of the component delegates in parallel. That's probably the easiest way to go.
(It returns Delegate[] but you can cast each instance to the right type. You may even get away with casting the array itself - I can't remember exactly what kind of array it actually creates.)
来源：https://stackoverflow.com/questions/4302090/parallel-eventhandler