Question : Code design consideration for heavy traffic web app

Experts,
In terms of writing C# code are there any design considerations for heavy traffic web apps ? I mean any preferred Creational Patterns, Structural Patterns or any other sort of patterns that should be used ? Or should i prefer object composition over inheritance ? Should I make a heavy use of interfaces and abstraction ? Any specific ways to caching the data that i should concentrate upon ?
Also in terms of UI any specific considerations ? How about connection pooling ? Is it really helpful for a user heavy web site ?

Answer : Code design consideration for heavy traffic web app

Line 14 should be the following. I have not used perl for this before and referenced the IBM site.

http://www.ibm.com/developerworks/linux/library/l-pexcel/index.html

1:	my $new_worksheet = $new_workbook->Worksheets("Drivers");