Push Notification for iphone

i want开发者_如何学运维 to develope a windows service which sends a push notification to iphone for content update. is there any sample code or project available to do so and is there any API or helper class to implement push notification.

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Go through follwowing two links http://mobiforge.com/developing/story/programming-apple-push-notification-services and http://www.macoscoders.com/2009/05/17/iphone-apple-push-notification-service-apns/

Hope this helps.

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yeah go for apnssharp, free, opensource , works a treat

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got the right certificate and how push notification working for me for iphone but i found that there is a small bug in apns sharp lib. after fixing that i can send notification to iphone