ASP.NET pages are compiled, which makes them faster than Classic ASP.
ASP.NET has better language support, a large set of user controls, XML-based components, and integrated user authentication.
ASP.NET pages have the extension .aspx, and are normally written in VB (Visual Basic) or C# (C sharp).
User controls in ASP.NET can be written in different languages, including C++ and Java.
When a browser requests an ASP.NET file, the ASP.NET engine reads the file, compiles and executes the scripts in the file, and returns the result to the browser as plain HTML.