private void AddButton_Click(object sender, EventArgs e)
{
List <SongEntry> selected = (from SongEntry s in SongList.SelectedItems select s).ToList();
List <string> path = PathToSelectedGroup();
TreeNode group = GroupList.SelectedNode;
if (group.ForeColor != Color.RoyalBlue)
{
group = group.Parent;
}
GroupList.BeginUpdate();
SongList.BeginUpdate();
foreach (var s in selected)
{
Metadata.AddSongToGroup(path, s.UniqueId);
AddTreeViewSong(group, s);
SongList.Items.Remove(s);
}
GroupList.EndUpdate();
SongList.EndUpdate();
MadeChanges = true;
}