Deletes all dirty objects inside the collection passed from the persistent storage. It will do this inside a transaction if a transaction is not yet available. Entities which are physically deleted from the persistent storage are marked with the state 'Deleted' but are not removed from the collection.

public override int DeleteEntityCollection(
	IEntityCollection2 collectionToDelete
)

Public Overrides Function DeleteEntityCollection ( 
	collectionToDelete As IEntityCollection2
) As Integer