[Description] Contains source code for utility classes and business objects (for example, .cs, .vb, and .jsl files) that you want to compile as part of your application. In a dynamically compiled application, ASP.NET compiles the code in the App_Code folder on the initial request to your application. Items in this folder are then recompiled when any changes are detected. Note: Arbitrary file types can be placed in the App_Code folder to create strongly typed objects. For example, placing Web service files (.wsdl and .xsd files) in the App_Code folder creates strongly typed proxies. Code in the App_Code folder is referenced automatically in your application. In addition, the App_Code folder can contain subdirectories of files that need to be compiled at run time. For more information, see Shared Code Folders in ASP.NET Web Sites and codeSubDirectories Element for compilation (ASP.NET Settings Schema). [Folder] 
App_Code
A p p _ B r o w s e r s
A p p _ C o d e
A p p _ D a t a
A p p _ G l o b a l R e s o u r c e s
A p p _ L o c a l R e s o u r c e s
A p p _ T h e m e s
A p p _ W e b R e f e r e n c e s
B i n