https://learn.microsoft.com/ja-jp/dotnet/api/system.windows.documents.documentstructures.liststructure?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
ListStructure Class (System.Windows.Documents.DocumentStructures) | Microsoft Learn
Represents a list of items in a document.
class systemwindowsdocumentsmicrosoftlearn