Understanding routing in Global.asax (asp.net-mvc)

Question

In Global.asax what does the following signify?

 routes.IgnoreRoute(\"{resource}.axd/{*pathInfo}\");     

Answer 1

It tells the routing engine to ignore this request and leave it to ASP.NET Webforms to handle things.

This is useful for example ELMAH logging that uses the handler elmah.axd.