Is it a good idea to use PollingDuplexHttpBinding with Silverlight in conjunction with the function RegisterScriptableObject to achieve Comet-style javascript functionality?
(see tutorial)
I have never seen this approach discussed in the forums, or recommended as a free solution. Instead only heard about paid options such as WebSync and PokeIn.
Does Silverlight implement the the Bayeux protocol? Should it?
You'll have some serious scalability problems, and it's a royal pain to implement. See:
http://devgripes.wordpress.com/2009/11/14/pollingduplexhttpbinding-absolute-rubbish/
If you want a Bayeux implementation in Silverlight, you want WebSync.
(Disclaimer: I work for Frozen Mountain Software)
来源：https://stackoverflow.com/questions/5449642/http-push-comet-reverse-ajaxusing-silverlight-to-javascript-bridge