Reloads the current Collection Source's CollectionSourceBase.Collection.
Execution of this method raises two events - CollectionSourceBase.CollectionReloading and CollectionSourceBase.CollectionReloaded. The CollectionReloading event occurs before the collection has been reloaded. The CollectionReloaded event occurs after the collection has been reloaded. Handle these events to be notified when a Collection Source's collection is reloaded from the database. Additionally, you may need to handle the CollectionSourceBase.CollectionChanging and CollectionSourceBase.CollectionChanged events. These events occur when the collection is recreated.
When deriving from the CollectionSourceBase class, override this method to reload the Collection Source's collection.