The view \'Index\' or its master was not found. The following locations were searched: ~/Views/ControllerName/Index.aspx ~/Views/ControllerName/Index.ascx ~/Views/Sh
I have had this problem too; I noticed that I missed to include the view page inside the folder that's name is same with the controller.
Controller: adminController View->Admin->view1.cshtml
(It was View->view1.cshtml)(there was no folder: Admin)