Durable but cynical publisher in C#

//
// Publisher for durable subscriber
//

// Author: Michael Compton
// Email: ku.oc.egdeelttil|notpmoc.leahcim#ku.oc.egdeelttil|notpmoc.leahcim

using System.Text;
using System.Threading;
using ZMQ;

namespace ZMQGuide
{
internal class Program
{
public static void Main(string[] args)
{
using (var context = new Context(1))
{
using (Socket sync = context.Socket(SocketType.PULL), publisher = context.Socket(SocketType.PUB))
{
sync.Bind("tcp://*:5564");

publisher.HWM = 1;
// Specify swap space in bytes, this covers all subscribers
publisher.Swap = 25000000;
publisher.Bind("tcp://*:5565");

// Wait for synchronization request
sync.Recv();

for (int updateNumber = 0; updateNumber < 10; updateNumber++)
{
publisher.Send("Update " + updateNumber, Encoding.Unicode);
Thread.Sleep(1000);
}

publisher.Send("END", Encoding.Unicode);
}
}
}
}
}