Simple web design, web development, information technology, & technical communication

An ASP.NET include, or server-side include, is a plain HTML, HTML/ASP.NET, or ASP.NET-only file that sits outside of a parent Web page. The power of a simple include file is tremendous—it allows you to re-use content that will appear on multiple pages throughout your site. Instead of making the same change 100 times to update 100 pages, you could use an include, update the include file once and have the change populated across all 100 pages. Nice, huh?