ButtonTest02.MainWindow.MainWindow C# (CSharp) Method

        static MainWindow()
        {
            FrameworkPropertyMetadata metadata = new FrameworkPropertyMetadata();
            metadata.Inherits = true;
            SpaceProperty = SpaceButton.SpaceProperty.AddOwner(typeof(MainWindow));
            SpaceProperty.OverrideMetadata(typeof(Window), metadata);
        }