static LinkButton() { FrameworkElementExt.OverrideDefaultStyleKey(); }
static CheckMark() { FrameworkElementExt.OverrideDefaultStyleKey(); }
static PopupToggle() { FrameworkElementExt.OverrideDefaultStyleKey(); EventManager.RegisterClassHandler(typeof(PopupToggle), Mouse.MouseDownEvent, new MouseButtonEventHandler(OnMouseButtonDown), true); }