ListManager delegate not detecting deletes

Originally posted by mrivers I've created a ListManager who's delegate always returns true when an entity being managed by the ListManager changes or is added. I would also like the delegate to catch any deletions of the managed entity type. Do I have to do something different to be able to detect the deletions?   Here is my code snippet: ........................................................ mEntityList = pManager.PersistenceManager.GetEntities<Property_Entity>(pQuery); Predicate<Property_Entity> predicate = delegate(Property_Entity pType) { return true; };   mEntityList.ListManager = new EntityListManager<Property_Entity>(pManager.PersistenceManager, predicate, new EntityColumn[] { Property_Entity.PropertyidEntityColumn, Property_Entity.PresentvalueEntityColumn, Property_Entity.LiquidEntityColumn }); .............................................

Originally posted by mrivers Do I have to do something different to be able to detect the deletions?

1. DevForce removes deleted entities from EntityLists as a matter of course: no EntityListManager required.  What contrary behavior are you seeing?

2. EntityListManagers can be expensive, performance-wise, if overused and/or defined inefficiently. The EntityListManager you've defined looks somewhat inefficient in that, since you've said *any* entity of the specified type belongs in the list (no exclusionary criteria in the predicate), I don't see what the point is of monitoring the Presentvalue and Liquid entity columns. The test on the PropertyidEntityColumn will already guarantee that any new instance of Property_Entity will get included in your list; and there's no change to either a Presentvalue or Liquid property that would cause an entity already in the list to be removed from it.