http://developers.de/blogs/damir_dobric/archive/2008/08/02/list-lt-object-gt-performance.aspxFew days ago run into requirement to store about 500.000 objects in the List<object>. To store that amount of data in the list is not an issue. list.Find(item => item.Arg1 == arg1 && item.Arg2== arg2 && item.Arg3 ==arg3 &&enCommunityServer 2008 SP1 (Build: 30619.63)