private void Monument_Button_Click(object sender, RoutedEventArgs e)
        {
            MemoryViewer mv = new MemoryViewer("Monuments", 2);

            this.NavigationService.Navigate(mv);
        }
 private void TolstoyHistory_Button_Click(object sender, RoutedEventArgs e)
 {
     MemoryViewer mv = new MemoryViewer("Tolstoy", 6);
     this.NavigationService.Navigate(mv);
 }
 private void Monument_Button_Click(object sender, RoutedEventArgs e)
 {
     MemoryViewer mv = new MemoryViewer("Monuments", 2);
     this.NavigationService.Navigate(mv);
 }
 private void Musuem_Button_Click(object sender, RoutedEventArgs e)
 {
     MemoryViewer mv = new MemoryViewer("Museum", 5);
     this.NavigationService.Navigate(mv);
 }