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  • foreach (var p in List1.Concat(List2).Concat(List3)) { ... do stuff... } Commented Nov 3, 2008 at 11:51
  • If it's as simple as f(p), then leave out the { } for shorthand: for (var p in List1.Concat(List2).Concat(List2)) f(p);. Commented Jan 22, 2010 at 21:12