using System; using System.Collections.Generic; using System.Linq; using System.Text; public class MainClass { public static void Main() { string[] words = { "b", "c", "a", "ba", "ae", "ch" }; var wordGroups = from w in words group w by w[0] into g select new { FirstLetter = g.Key, Words = g }; foreach (var g in wordGroups) { Console.WriteLine("Words that start with the letter '{0}':", g.FirstLetter); foreach (var w in g.Words) { Console.WriteLine(w); } } } }