https://learn.microsoft.com/fr-fr/dotnet/api/system.windows.markup.dependsonattribute?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-9.0
DependsOnAttribute Class (System.Windows.Markup) | Microsoft Learn
Indicates that the attributed property is dependent on the value of another property.
class systemwindowsmarkupmicrosoftlearn