[asp.net-mvc-3] The name 'model' does not exist in current context in MVC3

There is also another reason. In my case, I had copy an index.cshtml file to web root folder (outside the Views folder) as a backup from remote server.

So, I kept changing my /views/web.config, kept changing my /views/home/index.cshtml and error kept happening... until found out the /index.cshtml outside the views folder, deleted it and sure, it all went back to normal!