List vs Dictionary - performance

http://theburningmonk.com/2011/03/hashset-vs-list-vs-dictionary/
http://dotnetslackers.com/Community/forums/performance-test-list-vs-arraylist-dictionary-vs-hashtable-objects/p/3131/31145.aspx
http://www.dotnetperls.com/dictionary-time
http://www.codebullets.com/dictionary-vs-list-lookup-658