Monitor.Pulse

   
 

using System;
using System.Threading;

class MessageBoard {
    private String messages = "no messages";

    public void Reader() {
        try {
            Monitor.Enter(this);
            if (messages == "no messages") {
                Console.WriteLine("{0} {1}",Thread.CurrentThread.Name, messages);
                Console.WriteLine("{0} waiting",Thread.CurrentThread.Name);
                Monitor.Wait(this);
            }
            Console.WriteLine("{0} {1}",Thread.CurrentThread.Name, messages);
        } finally {
            Monitor.Exit(this);
        }
    }

    public void Writer() {
        try {
            Monitor.Enter(this);
            messages = "Greetings!";
            Console.WriteLine("{0} Done writing message",Thread.CurrentThread.Name);
            Monitor.Pulse(this);
        } finally {
            Monitor.Exit(this);
        }
    }

    public static void Main() {
        MessageBoard myMessageBoard = new MessageBoard();

        Thread reader = new Thread(new ThreadStart(myMessageBoard.Reader));
        reader.Name = "ReaderThread:";

        Thread writer = new Thread(new ThreadStart(myMessageBoard.Writer));
        writer.Name = "WriterThread:";

        reader.Start();
        writer.Start();
    }
}