您需要实现发布和订阅设计。在WCF，你可以用net-TCP协议在双工客户端和服务器连接

You need to implement a publish and subscribe design. In WCF you could use net-tcp protocol to connect in duplex clients and server.

您可以下载一个相当不错的实现上的 http://www.idesign.net/Downloads/GetDownload/2032

You could download a quite good implementation on http://www.idesign.net/Downloads/GetDownload/2032

和你会发现一篇好文章这里。

And you will find a good article here.

问候