https://learn.microsoft.com/ja-jp/dotnet/api/system.data.datatable.extendedproperties?view=netframework-4.8.1&viewFallbackFrom=net-10.0
DataTable.ExtendedProperties Property (System.Data) | Microsoft Learn
Gets the collection of customized user information.
property systemdatatablemicrosoftlearn
https://learn.microsoft.com/es-es/dotnet/api/system.data.datarelation.extendedproperties?view=netframework-4.8.1&viewFallbackFrom=net-10.0
DataRelation.ExtendedProperties Property (System.Data) | Microsoft Learn
Gets the collection that stores customized properties.
property systemdatamicrosoftlearn