using System;

using System.Linq;

using System.Collections.Generic;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        // User Defined Input From Command

        string command = "5,20,33,92,92,92,92,92,92,92,92,92,92,92,92,92,92,92,92,92,92,92,92";

        string newbuilder = "";

        int totalstrings = 0;

        // Check For New Block ID

        if (command.Contains(","))

        {

            string text88 = command;

            new List<string>();

            List<string> list38 = text88.TrimStart(new char[]{','}).Split(new char[]{','}).ToList<string>();

            foreach (string value4 in string.Join(" ", list38.ToArray()).Split(new char[]{' '}))

            {

                if (newbuilder == "")

                {

                newbuilder = newbuilder + value4;

                }

                else

                {

                    newbuilder = newbuilder + "|" + value4;

                }

                totalstrings = totalstrings + 1;

            }

            newbuilder = newbuilder + "]";

             newbuilder = "[" + newbuilder;

            // Get Random String

                var s = new RandomString(newbuilder);

        for (int i = 0; i < 1; i++)

            Console.WriteLine("Random String: " + s);

        }

        else

        {

            // Invalid Block ID

            Console.WriteLine("ERROR: Invalid Block ID!");

        }

    }

    public class RandomString {

    private Random _rnd = new Random();

    private static Regex _rex = new Regex(@"\[ ( \|?  (?<option>[^]|]+) )+ \]", System.Text.RegularExpressions.RegexOptions.IgnorePatternWhitespace | System.Text.RegularExpressions.RegexOptions.ExplicitCapture);

    string _template;

    public RandomString(string template) {

        _template = template;

    }

    public override string ToString() {

        return _rex.Replace(_template, GetRandomOption);

    }

    public string GetRandomOption(Match m) {

        var options = m.Groups["option"].Captures;

        int choice = _rnd.Next(0, options.Count);

        return options[choice].Value;

    }

}

}

​