A small command line tool to convert an input file into a C# byte array

ByteArray.cs

using System;
using System.IO;
using System.Linq;
using System.Text;

namespace ByteArray
{
    internal class EntryPoint
    {
        private static readonly string[] helpCmds = { "help", "/?", "--help", "-help", "-h" };
        private const string separator = ", ";
        private const string csStart = "private static readonly byte[] _rawData  = new byte[] { ";
        private const string csEnd = "};";
        private const int EXIT_FAILURE = 1;
        private const int EXIT_SUCCESS = 0;

        private static int Main(string[] argv)
        {
            if (argv.Length == 0 || argv.Select(s => s.ToLowerInvariant()).Intersect(helpCmds).Any())
            {
                return ShowHelp();
            }

            if (!File.Exists(argv[0]))
            {
                Console.WriteLine("no input file!");

                return EXIT_FAILURE;
            }

            var rawData = File.ReadAllBytes(argv[0]);

            var sb = new StringBuilder(rawData.Length).Append(csStart);

            foreach (var b in rawData) { sb.Append(b + separator); }

            Console.WriteLine(sb.ToString().TrimEnd(separator.ToCharArray()) + csEnd);

            return EXIT_SUCCESS;
        }

        private static int ShowHelp()
        {
            Console.WriteLine("");
            Console.WriteLine("Usage: ByteArray.exe <filename>");
            Console.WriteLine("Author: @jensen_petej");
            Console.WriteLine("");

            return EXIT_SUCCESS;
        }
    }
}