using System;

using System.Threading;

​

public class Program

{

    public static void Main()

    {

        var signal = new ManualResetEvent (false);

        new Thread(() =>

        {

            Console.WriteLine("Waiting for signal...");

            signal.WaitOne();

            signal.Dispose();

            Console.WriteLine("Got signal!");

        }).Start();

        Thread.Sleep(2000);

        signal.Set();

    }

}