/// <summary>
        /// Called when Save is changed on an object.
        /// </summary>
        private static void OnSaveInvalidated(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
        {
            Window Window = dependencyObject as Window;

            if (Window != null)
            {
                if ((bool)e.NewValue)
                {
                    WindowsSettings settings = new WindowsSettings(Window);
                    settings.Attach();
                }
            }
        }
#pragma warning disable 618 // PersistId is an obsolete property and may be removed in a future release.  The value of this property is not defined.
            /// <summary>
            /// Construcor
            /// </summary>
            /// <param name="_windowSettings"></param>
            public WindowApplicationSettings(WindowsSettings windowSettings) : base(windowSettings._window.PersistId.ToString())
            {
                _windowSettings = windowSettings;
            }