> For the complete documentation index, see [llms.txt](https://jen-hsuan-hsieh.gitbook.io/asp-net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jen-hsuan-hsieh.gitbook.io/asp-net/chapter1/1.1.the-complete-asp.net-mvc-5-course/111deployment/1115custom-error-pages.md). # 1.11.5.Custom Error Pages * 1.Try to throw an exception ``` public ActionResult About() { throw new Exception(); return View(); } ``` * 2.Edit web.config * RemoteOnly: when running on local site, it will turn off ``` ``` * 3.Add 404.html ```

Not found

``` * 4.Edit web.config ``` ```