https://learn.microsoft.com/fr-fr/dotnet/api/system.windows.dependencyobject.dependencyobjecttype?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-8.0
DependencyObject.DependencyObjectType Property (System.Windows) | Microsoft Learn
Gets the DependencyObjectType that wraps the CLR type of this instance.
property systemwindowsmicrosoftlearn
https://learn.microsoft.com/en-us/dotnet/api/system.windows.dependencyobjecttype?view=netframework-4.7.1
DependencyObjectType Class (System.Windows) | Microsoft Learn
Implements an underlying type cache for all DependencyObject derived types.
class systemwindowsmicrosoftlearn