SPItemEventProperties.BeforeProperties Property
Gets a hash table of properties consisting of string/value pairs that correspond to fields in the SPItem object before the event occurred.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: Yes
Available in SharePoint Online
Property Value
Type: Microsoft.SharePoint.SPItemEventDataCollectionAn SPItemEventDataCollection object that represents the properties of the item before the event occurred.