'宣言
Public Interface NamedObjectCollection.IItem
(Of As GrapeCity.Spreadsheet.NamedObjectCollection/IItemIItemItemtememm(Of TItem,TContainer),
As GrapeCity.Spreadsheet.NamedObjectCollection/IContainerIContainerContainerontainerntainertainerainerinernererr(Of TItem,TContainer))
public interface NamedObjectCollection.IItem<,>
where TItem: GrapeCity.Spreadsheet.NamedObjectCollection/IItemIItemItemtememm<TItem,TContainer>
where TContainer: GrapeCity.Spreadsheet.NamedObjectCollection/IContainerIContainerContainerontainerntainertainerainerinernererr<TItem,TContainer>