https://learn.microsoft.com/pt-br/dotnet/api/system.data.objects.dataclasses.structuralobject?view=netframework-4.8.1&viewFallbackFrom=net-10.0
StructuralObject Class (System.Data.Objects.DataClasses) | Microsoft Learn
Represents a class that contains the common methods need for a date object.
class systemdata objectsdataclassesmicrosoftlearn
https://learn.microsoft.com/en-us/dotnet/api/system.data.objects.dataclasses.structuralobject.propertychanging?view=netframework-4.8.1&redirectedfrom=MSDN
StructuralObject.PropertyChanging Event (System.Data.Objects.DataClasses) | Microsoft Learn
Occurs when a property value change is a pending.
event systemdata objectsdataclassesmicrosoftlearn