using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass { public static void Main() { string[] presidents = {"A", "B", "Bu", "Bush", "C", "Cl"}; var nameObjs = presidents.Select((p, i) => new { Index = i, LastName = p }); foreach (var item in nameObjs) Console.WriteLine("{0}. {1}", item.Index + 1, item.LastName); } }