asp.net mobile page

For creating an mobile friendly application you dont need to worry for the code.. you just need to concentrate on the design part.

you can create an Responsive website (mobile Friendly) by using HTML5 and css3.

Please refer the tutorials 

http://www.dzyngiri.com/lets-create-responsive-web-page-tutorial/

http://www.hongkiat.com/blog/responsive-web-tutorials/

http://www.1stwebdesigner.com/css/responsive-website-tutorial/

http://flauntresponsive.com/blog/responsive-website-design-tutorial/

Cheers!!!!