Master Page & Themes

[suganya]

Hi

Can any body help me how to add theme in master page. I have added

App_Theme-->Default-->HelloDr.css in my project.

[gayane]

In source of masterpage in first line(master section) add
EnableTheming=" true"

in web.config there is <pages> tag
in that tage add <pages theme="Default" >

it must work ;-)