bool WeakReferences { set; }

turns weak reference management on or off.

This method must be called before opening a database.

Performance may be improved by running db4o without using weak references durring memory management at the cost of higher memory consumption or by alternatively implementing a manual memory management scheme using Db4objects.Db4o.Ext.IExtObjectContainer.Purge(System.Object)

Setting the value to false causes db4o to use hard references to objects, preventing the garbage collection process from disposing of unused objects.

The default setting is true.