ASP.NET 4 Unleashed

Creating a Global.asax File

By default, the ASP.NET Framework maintains a pool of HttpApplication objects to service incoming page requests. A separate HttpApplication instance is assigned to each request.

If you prefer, you can create a custom HttpApplication class. That way, an instance of your custom class is assigned to each page request.

You can create custom properties in your derived class. These properties can be accessed from any page, control, or component. You also can handle any application events in your custom HttpApplication class.

You create a custom HttpApplication class by creating a special file named Global.asax in the root of your application. Every application can have one and only one of these files. For example, the