C # in a Nutshell, Second Edition

This delegate is passed to a ThreadPool . If the wasSignaled parameter is true , then the delegate is invoked in response to a signal; otherwise , it is invoked because the handle timed out.

public delegate void WaitOrTimerCallback (object state , bool timedOut );

Passed To

ThreadPool.{RegisterWaitForSingleObject( ) , UnsafeRegisterWaitForSingleObject( )}