INameScope.UnregisterName Method (String)
Unregisters the provided name from the current XAML namescope.
Assembly: System.Xaml (in System.Xaml.dll)
Notes to Implementers:
If the input name does not exist, throw an exception.
You should remove the name and the previously registered element it refers to from the collection representation of the XAML namescope, so that the same name could potentially be registered again in the future.
Available since 3.0