using System;

using System.Text.RegularExpressions;

​

namespace Examples

{

    public class Example2

    {

        public static void Main()

        {

            string pattern = @"\ba\w*\b";

            string input = "An extraordinary day dawns with each new day.";

            Match m = Regex.Match(input, pattern, RegexOptions.IgnoreCase);

            if (m.Success)

                Console.WriteLine("Found '{0}' at position {1}.", m.Value, m.Index);

        }

    }

}

​

// The example displays the following output:

//        Found 'An' at position 0.