public MainWindow()
        {
            InitializeComponent();
            CreatePropertyGrid();
            DataContext = new MockViewModel();

            //var dockableContent = new DockableContent() { Title = "Test", Content = new TextBox() };
            //dockableContent.Show(DockManager, AnchorStyle.Bottom);

            //var dockableContent2 = new DockableContent() { Title = "Test2", Content = new TextBox() };
            //dockableContent.ContainerPane.Items.Add(dockableContent2);

            //for (int i = 0; i < 20; i++)
            //    OnCreateNewDocumentContent(null, null);
            
        }