https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Object/isFrozen
Object.isFrozen() - JavaScript | MDN
Die statische Methode Object.isFrozen() bestimmt, ob ein Objekt eingefroren ist.
objectjavascriptmdn
https://learn.microsoft.com/en-us/dotnet/api/system.windows.freezable.isfrozen?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-8.0
Freezable.IsFrozen Property (System.Windows) | Microsoft Learn
Gets a value that indicates whether the object is currently modifiable.
property systemfreezablewindowsmicrosoftlearn