Is it possible to observe Rss feed change in C#?

I want to create a service that would listen to few Rss feeds and parse new feeds to jSon for further use. Is it possible to observe to feed c开发者_如何学Changes and if yes then how?

thanks

Check out the System.ServiceModel.Syndication.SyndicationFeed namespace in the framework - it has pretty much everything you need to download feeds. Scott Guthrie has a couple of good example blog posts about reading feeds here and here.

The only way to observe RSS feed changes is to poll the feed by requesting it over a set interval of time. This is because a feed is typically delivered over HTTP, which is a stateless request-response protocol and not a publish-subscribe protocol.

I suggest you check out RSS.NET, per it's website it can listen for changes.