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Understanding Applications Pages

Application pages reside in the file system. These are different from web part pages, which are stored in the database. Unlike web part pages, application pages are not customizable. Application pages reside in the Layouts folder under the <14 Hive>\Template folder. An application page is really like the usual ASP.NET page that inherits from the Microsoft.SharePoint.WebControls.LayoutsPageBase class.

Try It Yourself: Write a Simple Application Page

1. Create a new empty SharePoint project and name it DemoApplicationPage. Add a new item of type Application Page named as SiteInfo.aspx. A new ASPX page and code behind file gets added to the project under the Layouts\DemoApplicationPage folder, as shown in Figure ...