What are the different types of server controls present in ASP.Net? When you will use them?

Answer:

ASP.Net provides two distinct types of server controls i.e. HTML server controls and Web server controls.
HTML Server: When converting traditional ASP 3.0 web pages to ASP.Net web pages.
When you want to explicitly control the code that is generated for the browser.

Web Server: When you require a richer set of functionality to perform complicated page requirements.
When you are developing web pages that will be viewed by a multitude of browser types and that require different code based upon these types.