Roman Numerals?

//  After someone demonstrating that haskal can convert roman numerals to decimal in 1LOC
//  I thought I'd show that stupidity isn't limited to that language alone.
//  http://thedailywtf.com/Articles/Roman-Enumeration.aspx

using System;
using System.Linq;

namespace RomanNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                (from fluff in " "
                 let n = (from c in Console.ReadLine().ToUpper()
                          where "IVXLCDM".Contains(c)
                          select c == 'I' ? 1 : c == 'V' ? 5 : c == 'X' ? 10 : c == 'L' ? 50 : c == 'C' ? 100 : c == 'D' ? 500 : 1000).ToList()
                 let r = from i in Enumerable.Range(0, n.Count)
                         let l = i > 0 && n[i] > n[i - 1] ? -n[i - 1] * 2 : 0
                         select n[i] + l
                 select r.Sum()).ToList().ForEach(Console.WriteLine);
            }
        }
    }
}