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'宣言 Public NotInheritable Class StringItem Inherits GrapeCity.Wpf.SpreadSheet.CellType.Editors.Item(Of String)
public sealed class StringItem : GrapeCity.Wpf.SpreadSheet.CellType.Editors.Item<string>
System.Object
GrapeCity.Wpf.SpreadSheet.CellType.Editors.Item<T>
GrapeCity.Wpf.SpreadSheet.CellType.Editors.StringItem