Sharepoint 2010: BeforeProperties and AfterProperties in Event Receivers!

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Event Receiver is a great feature for Sharepoint 2010, but I spent many time to discover how Properties works..
Especially BeforeProperties and AfterProperties..

I found a great post with resume all available values. Here table and below the link!

http://www.synergyonline.com/Blog/Lists/Posts/Post.aspx?ID=122

These are the values of the properties in List events:
ListBeforePropertiesAfterPropertiesproperties.ListItem
ItemAddingNo ValueNew ValueNull
ItemAddedNo ValueNew ValueNew Value
ItemUpdatingNo ValueChanged ValueOriginal Value
ItemUpdatedNo ValueChanged ValueChanged Value
ItemDeletingNo ValueNo ValueOriginal Value
ItemDeletedNo ValueNo ValueNull
And here are the properties available in Library events:
LibraryBeforePropertiesAfterPropertiesproperties.ListItem
ItemAddingNo ValueNo ValueNull
ItemAddedNo ValueNo ValueNew Value
ItemUpdatingOriginal ValueChanged ValueOriginal Value
ItemUpdatedOriginal ValueChanged ValueChanged Value
ItemDeletingNo ValueNo ValueOriginal Value
ItemDeletedNo ValueNo ValueNull

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