Listing 16: The Runner Class
using System;
using System.Threading;

namespace Calculator
{
	public class Runner
	{
		public static void Main(string [] args)
		{
			Calculator calc = new Calculator();
			Thread calcThread = new Thread(
       new ThreadStart(calc.CalcPowersOfTwo));

			Printer printer1 = new Printer();
			printer1.PrinterName = "First Printer";
			Thread p1Thread = new Thread(
       new ThreadStart(printer1.PrintPowersOfTwo));
			p1Thread.IsBackground = true;
			Printer printer2 = new Printer();
			printer2.PrinterName = "Second Printer";
			Thread p2Thread = new Thread(
       new ThreadStart(printer2.PrintPowersOfTwo));
			p2Thread.IsBackground = true;
			Printer printer3 = new Printer();
			printer3.PrinterName = "Third Printer";
			Thread p3Thread = new Thread(
       new ThreadStart(printer3.PrintPowersOfTwo));
			p3Thread.IsBackground = true;
			Printer printer4 = new Printer();
			printer4.PrinterName = "Fourth Printer";
			Thread p4Thread = new Thread(
       new ThreadStart(printer4.PrintPowersOfTwo));
			p4Thread.IsBackground = true;

			calcThread.Start();
			p1Thread.Start();
			p2Thread.Start();
			p3Thread.Start();
			p4Thread.Start();

			// Wait for the Calculator thread to finish
			calcThread.Join();

			// Signal the QueueReady event to allow a printer thread 
       // to drain the queue of any remaining values
			Calculator.QueueReady.Set();

			Console.ReadLine();
		}
	}
}