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use to describe the behavior of the application. This text has only a documentation purpose and is blissfully ignored by the ASP.NET parser. Language indicates the language being used in the file. The Inherits attribute indicates a code-behind class for the application to inherit. It can be the name of any class derived from the HttpApplication class. The assembly that contains the class must be located in the Bin subdirectory of the application.

Code Declaration Blocks

A global.asax file can contain code wrapped by a

If the language attribute is not specified, ASP.NET defaults to the language set in the configuration, which is Microsoft Visual Basic .NET. The source code can also be loaded from an external file, whose virtual path is set in the Src attribute. The location of the file is resolved using Server.MapPath—that is, starting under the physical root directory of the Web application.

The Counter property defined in the preceding code works like an item stored in Application—namely, it is globally visible across pages and sessions. Consider that concurrent access to Counter is not serialized; on the other hand, you have a strong-typed, direct global item whose access speed is much faster than retrieving the same piece of information from a generic collection such as Application.

To access the property from a page, you must use the ASP.global_asax qualifier, shown here:

Response.Write(ASP.global_asax.Counter.ToString());

If you don’t particularly like the ASP.global_asax prefix, you can alias it as long as you use