If this is a beginner question about LIST, the answer is learn to work with lists, what you probably want to do is to iterate over a list and add worksheets.
If this is a question about how to add a worksheet, see this
http://stackoverflow.com/questions/193092/c-sharp-how-to-add-excel-worksheet-programatically-office-xp-2003[
^]
and, as always, I would like to recommend you using the Open XML 2 SDK instead of Excel automation, because it will work even if Excel is not installed...
have fun.
Submit an article or tip