SPEventPropertiesBase.Cancel Property
Gets or sets a Boolean value that indicates whether to cancel the event.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: Yes
Available in SharePoint Online
This is a deprecated property and should not be used. Instead, use the Status property to cancel an event. A true value is equivalent to setting Status to CancelWithError. A false value is equivalent to setting Status to Continue.