private void btnRefresh_Click(object sender, EventArgs e)
{
_musicCollection = _client.GetSongs();
_musicCollection.Sort();
lbArtists.Items.Clear();
lbAlbums.Items.Clear();
lbSongs.Items.Clear();
for(int i = 0; i < _musicCollection.Artists.Count; i++) {
lbArtists.Items.Add(_musicCollection.Artists[i].Name);
}
}