private void DeleteFile_IndexChanged(object sender, EventArgs e)
{
_playlist.TryDeleteSongByKey(_filesInPlaylist.Items[_filesInPlaylist.SelectedIndex] as string);
_filesInPlaylist.Items.Clear();
_filesInPlaylist.Items.AddRange(_playlist.GetSongsKeys());
}
public static void DeleteSongComboBox(ComboBox comboBox, Playlist playlist)
{
playlist.TryDeleteSongByKey(comboBox.Items[comboBox.SelectedIndex] as string);
comboBox.Items.Clear();
comboBox.Items.AddRange(playlist.GetSongsKeys());
}