Sometimes when you browse to an .aspx page, you may receive one of the following error messages:

Could not load type 'Namespace.Global'.

-or-

Could not load type 'Namespace.PageName'.

In this turorial I will show you how to fix it. This is caused by These errors occur if the .aspx page or the Global.asax page contains a reference to a code-behind module and if the application has not been built.

SOLUTION

·         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

·         In Microsoft Visual Studio .NET, click Build on the Build menu.

Hope it help