Indicates whether the current Object Space is about to delete an object(s).
true if the current Object Space is deleting an object(s); otherwise, false.
When implementing the IObjectSpace interface in the BaseObjectSpace class's descendant, you don't have to implement the IsDeleting property. It's implemented in the BaseObjectSpace class. It is set to true before the delete operation is performed by the BaseObjectSpace.Delete method and then it is set to false after the delete has been performed.