Scenario: MVC ASP.NET application containing WCF data services. When you try to browse WCF data service .svc page you might get the error "Resource not found -404 error" .
Reson for such behavior : When you try to browse to data service page , the request is sent to MVC framework first rather than data service . As the controller is not defined for such request , error is send back.
Resolution :Ignore request redirection to MVC framework when WCF data service is requested .In order to achieve this add following to global.asax RegisterRoute function.