CairoExplorer.PropertiesPreview.ChangePreview C# (CSharp) Метод

        public void ChangePreview(object path, object caller, System.Windows.Point? pos)
        {
            Application.Current.Dispatcher.Invoke(new Action(delegate()
            {
                Properties p = null;
                foreach (var w in Application.Current.Windows)
                    if (w is Properties)
                        p = (Properties)w;

                if (p != null)
                    LoadWindow(path as WrapperFileSystemInfo, p, caller, pos);
                else
                {
                    p = new Properties();
                    p.Loaded += delegate(object sender, RoutedEventArgs e)
                    {
                        LoadWindow(path as WrapperFileSystemInfo, p, caller, null);
                    };
                    p.Show();
                }
            }));
        }