using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass { public static void Main() { string[] names = { "A1", "B123", "C123123", "E", "W" }; IEnumerable<string> sequence = names .Where(n => n.Length < 6) .Select(n => n); foreach (string name in sequence) { Console.WriteLine("{0}", name); } } }