private PlayListViewModel() { Add = new Command.AddPlaylistCommand(AddPlaylist); Delete = new Command.DeletePlaylistCommand(RemovePlaylist); AddItem = new Command.AddPlaylistItemCommand(AddPlaylistItem); DeleteItem = new Command.DeletePlaylistItemCommand(DeletePlaylistItem); UpItem = new Command.UpPlaylistItemCommand(UpPlaylistItem); DownItem = new Command.DownPlaylistItemCommand(DownPlaylistItem); LoadData(); }