using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string result = "";

        string error = "";

        string pattern = @"([\d-\s]+)";

        RegexOptions real_options = RegexOptions.None;

        string input = "a0-za";

        try {

            Regex re = new Regex(pattern, real_options);

            int [] group_nums = re.GetGroupNumbers ();

            Match m = re.Match (input);

            if (m.Success) {

                result = "Pass.";

​

                for (int i = 0; i < m.Groups.Count; ++ i) {

                    int gid = group_nums [i];

                    Group group = m.Groups [gid];

​

                    result += " Group[" + gid + "]=";

                    foreach (Capture cap in group.Captures)

                        result += "(" + cap.Index + "," + cap.Length + ")";

                }

            } else {

                result = "Fail.";

            }

        } catch (Exception e) {

            error = e.Message + "\n" + e.StackTrace + "\n\n";

            result = "Error.";

        }

        Console.WriteLine("result: {0} error: {1}", result, error);

    }

}