قراءة الـ wav file وتحويله إلى Binary

عندي console application  محاولة لقراءة الـ wav file  وتحويله إلى Binary  هادا الكود بتاعي لكن أتوقع أنة خطء

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.DirectX;
using Microsoft.DirectX.DirectSound;
using Microsoft.DirectX.AudioVideoPlayback;
using NAudio;
using NAudio.Wave;
using System.Media;

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            const String filename = @"C:\Users\user\Documents\Visual Studio 2012\Projects\ConsoleApplication6\ConsoleApplication6\wolf_x.wav";
            try
            {
                SoundPlayer(filename);
            }
            catch (Exception) {
                Console.WriteLine("couldn't play");
            }
            try
            {
                Console.Write(Audiotobinary(filename));
            }catch(Exception){
                Console.WriteLine("couldn't convert");
            }
            Console.ReadLine();
        }

        private static void SoundPlayer(String fileurl) {
            using (SoundPlayer Player = new SoundPlayer(fileurl))
            {
                Player.PlaySync();
            } 
        }

        private static String Audiotobinary(String fileurl)
        {
            String tobinary;
            byte[] bytes = System.IO.File.ReadAllBytes(fileurl);
            tobinary = bytes.ToString();
            return tobinary;
        }
    }
}