https://learn.microsoft.com/pl-pl/dotnet/api/system.windows.coercevaluecallback?view=netframework-4.8.1
CoerceValueCallback Delegate (System.Windows) | Microsoft Learn
Provides a template for a method that is called whenever a dependency property value is being re-evaluated, or coercion is specifically requested.
delegatesystemwindowsmicrosoftlearn
https://learn.microsoft.com/en-us/dotnet/api/system.windows.propertymetadata.coercevaluecallback?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
PropertyMetadata.CoerceValueCallback Property (System.Windows) | Microsoft Learn
Gets or sets a reference to a CoerceValueCallback implementation specified in this metadata.
property systemwindowsmicrosoftlearn