Why can't I hide submenus in the vertical navbar?

Question

I can't hide submenus in the vertical nav bar after clicking the submenu that links to the web form in the folder. But it's fine for webforms outside the folder.

Answer 1

I got the answer. I have master page and content pages. It is file path issue. Menu works properly for the files in the same folder with the master page but not for the files in the different folder. I found this link and got the answer for my problems.

ASP.Net Master Page and File path issues