using System; using System.Collections.Generic; using System.Linq; public class MainClass { public static void Main() { IEnumerable<char> vowels = "aeiou"; IEnumerator<char> rator = vowels.GetEnumerator(); IEnumerable<char> query = "Not what you might expect"; char vowel; while (rator.MoveNext()) { vowel = rator.Current; query = query.Where(c => c != vowel); } } }