The RegionCollection class provides a collection to store regions. Regions can be either (1) static regions on preprinted content or (2) dynamic regions created by the smartpen at runtime. A region collection has log(n) insert, delete, search performance. The 64-bit number used when accessing regions in a collection is the RegionId. It should be managed using the regionId class.

public class RegionCollection : AFPObject, IDisposable, IEnumerable;

RegionCollectionEx.cs