Could not load file or assembly 'App_Web_xxxx' or one of its dependencies. The system cannot find the file specified.

Stack Trace:
[FileNotFoundException: Could not load file or assembly 'App_Web_csf6r1ov, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.]
ASP.usercontrol_defaultpage_righttopsearch_ascx.__BuildControlTree(usercontrol_defaultpage_righttopsearch_ascx __ctrl) +0
System.Web.UI.UserControl.InitializeAsUserControl(Page page) +53
ASP.default_aspx.__BuildControlRighttopsearch1() +73
ASP.default_aspx.__BuildControlTree(default_aspx __ctrl) +1079
ASP.default_aspx.FrameworkInitialize() +51
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +55
System.Web.UI.Page.ProcessRequest() +105
System.Web.UI.Page.ProcessRequest(HttpContext context) +292
ASP.default_aspx.ProcessRequest(HttpContext context) +16
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +499
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +177

出现场景：页面可以正常访问没有更新任何地方，突然就出现了这个错误。
解决方案：解决的方法很奇怪，将发生错误的页面上加上debug="true"的指令，然后访问出错的页面，这时候页面就可以正常访问了；然后再把debug="true"去掉也可以正常访问。
这应该是microsoft的一个bug。

在ASP.NET 2.0 开发过程中，有时候开发人员可能会遇到这样的页面异常：

Could not load file or assembly 'App_Web_****, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.

异常信息中的****是一个随机字符串，我们知道App_Web_****是一个ASP.NET即时编译的临时程序集。

我是今天在用Orcas beta 1开发一个基于WCF服务的浏览器应用时遇到该问题的，通常地讲，这是一个ASP.NET 2.0处理临时程序集的已知问题，ASP.NET论坛上的billr578说微软建议：

(they suggested) setting batch compilation to false. Basically put batch="false" in the compiliation tag in your web.config. Apparently this is an issue they're working on.

也就是说在web.config里配置成这样子：

<compilation debug="true" batch="false">