How to solve Error cannot add duplicate collection entry of type add with unique key attribute 'value' in iis 7?

IIS7 defines a defaultDocument section in its configuration files which can be found in the %WinDir%\System32\InetSrv\Config folder. Most likely, the file index. Aspx is already defined as a default document in one of IIS7's configuration files and you are adding it again in your web.config.

The ideal scenario is to have in config so the application can be deployed to any server without having to reconfigure. IMHO I think the implementation within IIS is poor.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.