IIS 7 and Above
IIS 7 not working on class in App_code
Last post Mar 27, 2012 09:14 AM by sven86
Mar 21, 2012 02:44 AM|sven86|LINK
Mar 23, 2012 04:28 AM|Leo Tang - MSFT|LINK
It is probably that the App_Code doesn't located in an application's root directory. If this is your case, you can right-click its parent folder, click "Convert to Application" to fix this issue.
Understanding Sites, Applications, and Virtual Directories on IIS 7
Mar 27, 2012 09:14 AM|sven86|LINK