From forum post: https://www.noesisengine.com/forums/viewtopic.php?f=3&t=2484

In NoesisGUI the access modifier of FrameworkElement.OnApplyTemplate is 'protected', but in System.Windows, it is 'public'.
I need add macros to override this method, this is so urgly.

#if NOESIS

protected override void OnApplyTemplate()

#else

public override void OnApplyTemplate()

#endif

{

... ...

}