So i have to publish my web app to IIS, the web server favored in visual studio with c#. Do we have here in this forum the one who knows how to publish web app in IIS? thanks very much sir.Since a web app presumably has code that needs to run on a web server, you need to deploy that those files to a web server. You cannot just point your web browser to the directory and expect your web app to run. You might be able to get this to work if your web app is purely static pages and client side code, and your web browser still supports reading local files directly -- most modern browsers don't support this anymore by default for security reasons.