项目地址： https://github.com/zeromq/netmq
三方总结： https://www.cnblogs.com/hsiang/p/18622806

using (var server = new ResponseSocket("@tcp://localhost:5556")) // bind
using (var client = new RequestSocket(">tcp://localhost:5556"))  // connect
{
    // Send a message from the client socket
    client.SendFrame("Hello");

    // Receive the message from the server socket
    string m1 = server.ReceiveFrameString();
    Console.WriteLine("From Client: {0}", m1);

    // Send a response back from the server
    server.SendFrame("Hi Back");

    // Receive the response from the client socket
    string m2 = client.ReceiveFrameString();
    Console.WriteLine("From Server: {0}", m2);
}