//Load method, once form it initially loaded, will scan directory for .bin files to load into profiles
        private void FormMusicPlayer_Load(object sender, EventArgs e)
        {
            string[] files = System.IO.Directory.GetFiles(Directory.GetCurrentDirectory(), "*.bin");

            for (int i = 0; i < files.Length; i++)
            {
                BinaryIO io      = new BinaryIO();
                Profile  profile = io.BinaryRead(files[i]);
                profiles.AddUser(profile.User);
                RefreshProfiles();
            }
        }
        //function that reads a user and playlist from a binary file
        private void ReadProfileFromFile(string profileName)
        {
            string   filename = profileName + ".bin";
            BinaryIO io       = new BinaryIO();
            Profile  profile  = io.BinaryRead(filename);

            playList = profile.List;
            numSongs = playList.Length;

            FillBinaryTree();

            RefreshList();
        }