Use of countdownevent in C #

use of countdownevent in C #

Class Program {static Countdownevent _count = new Countdownevent (3); static void Main (string[] args) {Task.Factory.StartNew () = {T Hread.                Sleep (2000);                Console.WriteLine ("Thread 1 Complete"); _count.            Signal ();            });                Task.Factory.StartNew (() = {Thread.Sleep (5000);                Console.WriteLine ("Thread 2 Complete"); _count.            Signal ();            });                Task.Factory.StartNew (() = {Thread.Sleep (3000);                Console.WriteLine ("Thread 3 Complete"); _count.            Signal ();            });            Console.WriteLine ("Waiting tasks ...."); _count.            Wait ();            Console.WriteLine ("All Task completed");        Console.readkey (); The same effect can be achieved with the WaitAll of a Task: var t1 = Task.Factory.StartNew (() = {Thread.Sleep (2000);                        Console.WriteLine ("Thread 1 Complete");           });                var t2 = Task.Factory.StartNew (() = {Thread.Sleep (5000);                        Console.WriteLine ("Thread 2 Complete");           });                var t3 = Task.Factory.StartNew (() = {Thread.Sleep (3000);                         Console.WriteLine ("Thread 3 Complete");            });            Console.WriteLine ("Waiting tasks ....");            Task.waitall (T1, T2, T3);            Console.WriteLine ("All Task completed"); Console.readkey ();

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