public bool DeleteAlbumSong(AlbumSong albumSong)
        {
            try
            {
                AlbumSongTable.DeleteOnSubmit(albumSong);
                AlbumSongTable.Context.SubmitChanges();

                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }
        public bool SaveAlbumSong(AlbumSong albumSong)
        {
            try
            {
                if (albumSong.AlbumSongId == 0)
                {
                    AlbumSongTable.InsertOnSubmit(albumSong);
                }
                else
                {
                    AlbumSongTable.Context.Refresh(RefreshMode.KeepCurrentValues, albumSong);
                }

                AlbumSongTable.Context.SubmitChanges();

                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }