In general, the CSS files in the Skins folder (above the folders for the individual skins folders) are the base CSS files of the controls. They are also embedded in the controls' assembly. You will need to copy them in your application if you need to make some modifications in them; in addition, you will have to set the EnableEmbeddedBaseStylesheet
property of the control to false
In a word, if you need to set your custom skin, you don't need to include these files in your application.
the Telerik team
Registration for Q1 2011 What’s New Webinar Week is now open. Mark your calendar for the week starting March 21st and book your seat
for a walk through all the exciting stuff we ship with the new release!