From the organizing of your code I am guessing you…

Question

Editorial Team

Asked: May 13, 20262026-05-13T12:09:55+00:00 2026-05-13T12:09:55+00:00

I’m getting a strange error on my webserver for seemingly every file but the

I’m getting a strange error on my webserver for seemingly every file but the .aspx files.

Here is an example. Just replace ‘/robots.txt’ with any .jpg name or .gif or whatever and you’ll get the idea:

The controller for path ‘/robots.txt’
was not found or does not implement
IController.

I’m sure it’s something to do with how I’ve setup routing but I’m not sure what exactly I need to do about it.

Also, this is a mixed MVC and WebForms site, if that makes a difference.

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Editorial Team · Answer 1 · 2026-05-13T12:09:55+00:00

Editorial Team

You can ignore robots.txt and all the aspx pages in your routing.

routes.IgnoreRoute("{*allaspx}", new {allaspx=@".*\.aspx(/.*)?"});
routes.IgnoreRoute("{*robotstxt}", new {robotstxt=@"(.*/)?robots.txt(/.*)?"});

You might want to ignore the favicon too.

routes.IgnoreRoute("{*favicon}", new {favicon=@"(.*/)?favicon.ico(/.*)?"});