https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2019/10/18/howto-reset-browser-cache-of-css-files-upon-asp-net-mvc-app-publish.aspxOn an ASP.net MVC webapp I’m maintaining, I had the issue that due to caching of older CSS (stylesheet) files in the browser, if the user didn’t press F5/refresh, it wasn’t showing you some message (since I had added the class .center-horiz-vert in theelCommunityServer 2.1 SP3 (Build: 20423.1)