using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {       

        var simplifiedRegex = "<docnum> - <doctitle> [<revision>].<suffix>";

        var fullRegex = "^(?<docnum>\\w+)\\s*-\\s*(?<doctitle>[\\w\\s\\&\\,\\-]*)\\s*\\[(?<revision>\\w+)\\]\\.(?<suffix>\\w+)$";

        ValidateRegex(simplifiedRegex);

        Console.WriteLine("\n");

        Console.WriteLine("\n");

        ValidateRegex(fullRegex);

    }

    private static void ValidateRegex(string regexStr) {

        Console.WriteLine("Regex string: "+ regexStr);

        Regex regex = new Regex(regexStr, RegexOptions.IgnoreCase);

        Match match = regex.Match("");

        var isMatch = regex.IsMatch("");

        Console.WriteLine("isMatch: " + isMatch);

        var groupNames = regex.GetGroupNames();

        Console.WriteLine("Group name length: " + groupNames.Length);

        Console.WriteLine("Group names:");

        foreach (var name in groupNames) {

            Console.WriteLine(name);

        }

    }

}