.net - ICallbackEventHandler, HttpHandler, XMLHttpRequestObjext - which is the better method -

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Which of the three (iclacAventhandler, HTTPHandler, or XMLHTPPKAE Object object) is a better method to use? They are essentially the same? Does ICallbackEventHandler and HttpHandler have variations to use just XMLHttpRequestObject?

The HTTP handler is a server side type. XMLHttpRequest is client-side. I do not know what else is.


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