static void Main(string[] args) { string alphaNumeric = @"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789._-'"; string input = "Today is Friday. Tommorrow will be saturday, followed by Sunday."; string pattern = @"[Ss]\S+"; pattern = @"\W"; input = alphaNumeric; var parser = new RegexTest(); parser.PrintOutMatches(input, pattern); Console.ReadKey(); }