https://learn.microsoft.com/ja-jp/dotnet/api/system.security.accesscontrol.objectsecurity.groupmodified?view=netframework-4.8.1&viewFallbackFrom=net-10.0
ObjectSecurity.GroupModified Property (System.Security.AccessControl) | Microsoft Learn
Gets or sets a Boolean value that specifies whether the group associated with the securable object has been modified.
property systemsecurityaccesscontrolmicrosoftlearn