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With that in mind, Share Point 2010 is like a sea of icebergs – there is a lot going on under the surface that you may not notice until it’s too late.Unfortunately, that makes your project like the Titanic.If you were to check the document out and edit the properties on the document, you would see the Item Updating and Item Updated events fire once.Later on, when you checked the document in, you would see those events fire again.For example, if you define an instance level variable in the class to store data in the Item Updating event, then try to access that data in the Item Updated event, you will find that the data is not there when you go to check it in the Item Updated event.This is because you have two classes – one that is handling the Item Updating event and in which the instance level variable is set, and one that is handling the Item Updated event in which the instance level variable is not set.As such, if the item is being checked-in, the Before Properties will contain a value for the property and the After Properties will not.It’s a pretty simple fix, but we can definitely make it a bit more reusable for everyone on a development team and reduce the hassle of having to remember the specifics about how to run the check in their Item Updating and Item Updated event handlers.

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Also note: the Item Updating and Item Updated events that fire in response to the properties being edited from the dialog will always occur, even if the user is not entering or changing any of the values.Developing a Sharepoint application would have all the fun of a video game, if only you had infinite lives.Dangers lurk hidden out there which, if you run into them, can be a blow to your project and waste a great deal of time.Damon gives just one example of a poisoned dagger in the game of Sharepoint Development: The Item Event Receiver.I’m usually disappointed when writers employ oft-overused metaphors to describe a situation.

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