Note that MVC Core doesn’t need IIS for hosting — you can host MVC Core applications in Kestrel or they can even be self-hosted. ASP.Net MVC Core is open source, has built-in support for ...

When working with ASP.NET Core or ASP.NET Core MVC 5 you no longer need a web.config file. However, using a web.config file is perfectly valid if you’re hosting your application in IIS.