Server Error in ‘/myapp’ Application.

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 ‘Web.Global’.

Source Error: 

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

The Source File:/ierp2/global asax
The Line: 1.

Version Information: Microsoft.net Framework Version:4.0.30319; ASP.NET Version: 4.0.30319.1

The Web project referred to other class projects. When I opened Bin, it was empty. I just remembered that I had implemented the cleaning solution when I did the backup before, but I did not regenerate it this time.