public class GroupByColumnsCollection : Infragistics.Collections.CollectionBase<Column>, Infragistics.ICollectionBase, Infragistics.ICollectionBase<Column>, Infragistics.IProvideCustomPersistence
'宣言
Public Class GroupByColumnsCollection
Inherits Infragistics.Collections.CollectionBase(Of Column)
Implements Infragistics.ICollectionBase, Infragistics.ICollectionBase(Of Column), Infragistics.IProvideCustomPersistence