Unable to start debugging on the web server. Unable to connect to the web server. Verify that the web server is running and that incoming HTTP requests are not blocked by a firewall.

One of the very common error message you will get when you try to run or debug your ASP.NET web application or website.

One can check following items on his development environment:

• IIS is running
• World Wide Web Publishing service is running
• Application is configured to run using IIS

If the above three are configured properly, you will not get the error.