A clrzmq router that actually compiles & routes with the 3.x stuff.

gistfile1.cs

using System.Collections.Generic;
using ZeroMQ;

namespace Parsnips.ZeroMQ
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var context = ZmqContext.Create())
            {
                using (
                    ZmqSocket frontend = context.CreateSocket(SocketType.ROUTER),
                              backend = context.CreateSocket(SocketType.DEALER))
                {
                    frontend.Bind("tcp://*:5559");
                    backend.Bind("tcp://*:5560");

                    frontend.ReceiveReady += (sender, eventArgs) => RelayMessage(eventArgs.Socket, backend);
                    backend.ReceiveReady += (sender, eventArgs) => RelayMessage(eventArgs.Socket, frontend);
                    
                    using (var poller = new ZeroMQ.Poller(new List<ZmqSocket> {frontend, backend})) 
                    {
                        while(true) 
                        {
                            poller.Poll();
                        }
                    }
                }
            }
        }

        private static void RelayMessage(ZmqSocket source, ZmqSocket destination)
        {
            bool hasMore = true;
            while (hasMore)
            {
                byte[] buffer = new byte[0];
                int size;
                byte[] message = source.Receive(buffer, out size);

                hasMore = source.ReceiveMore;
                destination.Send(message, size, hasMore ? SocketFlags.SendMore : SocketFlags.None);
            }
        }
    }
}