ASP.NET Parser Error Message: Could not load type 'Web.Global'.

Server Error in '/myapp' Application.

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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#" %>

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

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

Web项目引用了其它的类项目，打开Bin一看，下面是空的，才想起来之前做备份的时候执行了清理解决方案，这次发布的时候没有重新生成，重新生成之后，把Bin目录下的文件复制到发布目录的Bin目录下，问题解决。