If you have a child app configured in IIS, and you don’t want the web.config of the parent application to affect your child app, here is how you tell the parent app’s config file to go chill down by the river alone. Example: blah.com/web.config
If you’ve ever seen this error, you probably pulled your hair out (if you still have some) and can’t figure out why IIS won’t just serve up your page. What is this madness about “There is a duplicate ‘system.web.extensions/scripting/scriptResourceHandler’ section defined” nonsense? Well, this is one of those things that is super simple to fix [...]