WCF Duplex Reentrant Services

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using DuplexClient.DuplexService;

public class CallBackHandler : ITemperatureCallback
{
    static InstanceContext site = new InstanceContext(new CallBackHandler());
    static TemperatureClient proxy = new TemperatureClient(site);

    public bool TempUpdate(double temp)
    {
        Console.WriteLine("Temp dropped to {0}", temp);
        return true;
    }

    class Program
    {
        static void Main(string[] args)
        {
            proxy.RegisterForTempDrops();

            Console.ReadLine();

        }
    }
}