Reduce an array using regex in C# and ruby

xfiles.cs

using System;
using System.Linq;
using System.Text.RegularExpressions;

namespace Program
{
    class XFiles
    {
        static int Main(string[] argv)
        {
            string[] names = { "Mark", "Richard", "Fox", "Scully" };

            var r = new Regex("(Fox|Scully)");

            var xfiles = names.Where(name => r.IsMatch(name)).ToArray();

            Console.WriteLine("Everyone: {0}", String.Join(", ", names));
            Console.WriteLine(" X-Files: {0}", String.Join(", ", xfiles));

            return 0;
        }
    }
}

xfiles.rb

names = ["Mark", "Richard", "Fox", "Scully"]

xfiles = names.select do |name|
    name =~ /(Fox|Scully)/
end

puts "Everyone: #{names.join(", ")}"
puts " X-Files: #{xfiles.join(", ")}"

Stopwatch 100 executions of each using simple shell script (windows / mingw32 bash)

Ruby

$ time xfiles100-rb.sh > /dev/null

real    0m3.955s
user    0m0.438s
sys     0m0.792s

C#

$ time xfiles100-cs.sh > /dev/null

real    0m5.029s
user    0m0.409s
sys     0m0.531s

193 vs 569 chars