Aion Kinah rates patcher

using System;
using System.IO;

namespace aion_test
{
    class Program
    {
        static void Main(string[] args)
        {
            var fname = args[0];
            var sr = new StreamReader(fname);
            var br = new BinaryReader(sr.BaseStream);

            var bts = File.ReadAllBytes(fname);
            Console.WriteLine("Opened!");
            for (var i = 0; i +4< bts.Length; i++)
            {
                var itemID = BitConverter.ToInt32(bts, i);
                if (itemID != 182400001)
                    continue;
                var minKinahs = BitConverter.ToInt32(bts, i + 8);
                var maxKinahs = BitConverter.ToInt32(bts, i + 12);
                Console.WriteLine("Found kinahs, drops {0} - {1}, applying rates ...", minKinahs, maxKinahs);

                minKinahs *= 500;
                maxKinahs *= 500;

                BitConverter.GetBytes(minKinahs).CopyTo(bts, i + 8);
                BitConverter.GetBytes(maxKinahs).CopyTo(bts, i + 12);

                i += 16;
            }
            Console.WriteLine("Search complete!");

            File.WriteAllBytes(fname+".new.dat", bts);

            Console.WriteLine("Saving complete!");
            Console.ReadLine();
        }
    }
}