ASP.NET is a server side technology for developing web based applications based on Microsoft .Net Framework. ASP.NET is run on the web server. When a user click on a page/website link on a web browser, a request is sent to the web server. The web server reads the code and generates a web page . The web page is then sent to the browser where the client reads this page. Since the processing is on the server, it is called 'Server Side technology'. Features of ASP.NET: It lets you write server side code using over 40 languages. Most popular being C# and VB ASP.NET pages are compiled, not interpreted It has full access to the functionality of .Net Framework... XML, web services, database interaction, emails, regular expression You can separate server side code of your page from HTML layout Easy to reuse common User Interface elements An ASP.NET page generally consists of the following: 1. Directive: Controls how page is compiles , how page is cached by web browser, erro