Error : “Unable to start debugging on the web server…” ASP.NET 4.0

Question

I am getting an error when I want to create a web site on IIS server. I am using Windows 7 and Visual Studio 2010.

Do I have to register or configure asp.net 4.0 for th

Answer 1

In Visual Studio 2010 this usually means there is a problem with Web.Config file that cannot be displayed in Debug mode. So, simply start the app using Ctrl F5 to run in normal mode will tell you which line in Web.Config is faulty.