Asp net gridview dropdownlist datasource and databinding. NET uses. NET offers the ability to build pages composed of controls similar to a Windows user interface. NET is a Microsoft web application development framework that allows programmers to build dynamic web sites, web applications, and web services. NET allows the use of C#, VB. Also see the section of the Wikipedia article that compares ASP. NET framework allowing you to write web applications using any CLS compliant language such as C#, VB. I want session timeout to be 60 minutes rather than the default 20 minutes. I'm not too familiar with . I have done the following Set <sessionState timeout="60"></sessionState> in web. Visual Studio 2008 syntax highlighting settings dialog calls these "HTML Server-Side Script".