Could not load type 'Nop.Web.MvcApplication'

I get this error when I try to run my site local.

Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load type 'Nop.Web.MvcApplication'.

Source Error:


Line 1:  <%@ Application Codebehind="Global.asax.cs" Inherits="Nop.Web.MvcApplication" Language="C#" %>


Any idea what I have done or what is wrong?

How did you deploy nopCommerce? Have a look at this page

Can it help to upgrade to 2.6? I'm running 2.5 now.

The strange thing is that it have worked before.