The IFeatureHolder type exposes the following members.
Check if the feature is present in this holder.
Count how many features are contained.
Create a new IFeature, and add it to this IFeatureHolder. This method will generally only work on ISequences, and on some IFeatures which have been attached to ISequences.
A particular ChangeType can never be raised by this Changeable.(Inherited from IChangeable.)
Remove a feature from this FeatureHolder.