This event is triggered when a change has been made to this collection.
Atalasoft.dotImage.Ocr (in Atalasoft.dotImage.Ocr.dll) Version: 126.96.36.199.0.297 (.NET 4.5.2, x86)
This event is used for internal maintenance of bounding boxes and confidence levels. It is typically not
necessary for client code to hook into it.