DependencyObject.ClearValue Method (DependencyProperty)
Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier.
Assembly: WindowsBase (in WindowsBase.dll)
Clearing the property value by calling ClearValue does not necessarily give a dependency property the default value that is specified in the dependency property metadata. Clearing the property only specifically clears whatever local value may have been applied. For more information, see Dependency Property Value Precedence.