http://msmvps.com/blogs/senthil/archive/2008/05/05/itertools-for-c-tee.aspxTee is a cool function that &quot;clones&quot; enumerators whatever their current state is - it basically allows you to branch off an enumerator into as many enumerators as you want, all independent of each other. You can do something like List&lt;int&gt;enCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/senthil/archive/2008/05/05/itertools-for-c-tee.aspx#1629852Sun, 01 Jun 2008 06:27:26 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1629852Itertools for C# - Tee | Log Parser Tips<p>Pingback from &nbsp;Itertools for C# - Tee | Log Parser Tips</p> <img src="http://msmvps.com/aggbug.aspx?PostID=1629852" width="1" height="1">