IIS Express is automatically disabling anonymous authentication for my project, why?

Question

When I switch my ASP.NET MVC project from Cassini web server to IIS Express, this is added to my applicationhost.config file:

Answer 1

It was because for some reason, this was in my csproj file:

disabled

Setting it to enabled fixes the issue (it can also be done from Visual Studio, select project, F4, set Anonymous Authentication in the properties grid to Enabled).