Reference from http://support.microsoft.com/kb/306155
当浏览C# .NET 的aspx 页时出现"Could not load type" 错误
症状：
当浏览一个.aspx页，可能会收到以下错误信息：
Could not load type 'Namespace.Global'.
-或-
Could not load type 'Namespace.PageName'.
原因：
这些错是因为aspx 页或Global.asax 包含一些后台代码模块的引用但应用程序却没有编译。
解决方案：
用以下方法编译应用程序：
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Use the C# command line compiler (CSC.exe) to run the following command: csc /t:library /r:System.web.dll /out:mydll.dll myfile.cs |
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In Microsoft Visual Studio .NET, click Build on the Build menu. |
NOTE: Microsoft Visual Basic .NET background compiles the project as soon as it is created. Because Visual C# .NET projects only background parse, you must explicitly build the application.
APPLIES TO
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Microsoft ASP.NET 1.0 |
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Microsoft Visual C# .NET 2002 Standard Edition |