What is a ScriptManager in ASP.NET AJAX?
In order to use AJAX functionality on a web page it is required to add a ScriptManager control to the page. ScriptManager control register Microsoft Ajax Library scripts to the web page so we should use the one ScriptManager per page. ScriptManager control enables script to use the type system extensions and to support features like partial-page rendering. Continue reading [Interview Question] What is a ScriptManager in ASP.NET AJAX?