Regex and letter case
using System; using System.Text.RegularExpressions; public class MainClass { public static void Main() { Regex q = new Regex(" in "); MatchCollection mm = q.Matches("IN at in or"); for (int i = 0; i < mm.Count; i++) { Console.WriteLine("Found '{0}' at position {1}",mm[i].Value, mm[i].Index); } } }