using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass { public static void Main() { string[] presidents = {"ant", "arding", "arrison", "eyes", "over", "ackson"}; IEnumerable<string> first = presidents.Take(5); IEnumerable<string> second = presidents.Skip(4); IEnumerable<string> concat = first.Concat<string>(second); IEnumerable<string> union = first.Union<string>(second); Console.WriteLine("The count of the array is: " + presidents.Count()); Console.WriteLine("The count of the first sequence is: " + first.Count()); Console.WriteLine("The count of the second sequence is: " + second.Count()); Console.WriteLine("The count of the concat sequence is: " + concat.Count()); Console.WriteLine("The count of the union sequence is: " + union.Count()); } }