public MusicViewModel()
{
SongGroups = Enumerable.Empty <IGrouping <string, Track> >();
ArtistGroups = Enumerable.Empty <IGrouping <string, Artist> >();
AlbumGroups = Enumerable.Empty <IGrouping <string, Album> >();
Playlists = Enumerable.Empty <Playlist>();
Songs = Enumerable.Empty <Track>();
Artists = Enumerable.Empty <Artist>();
Albums = Enumerable.Empty <Album>();
AlbumSortItems = MusicRepository.GetAlbumSortItems().Select(item => new SelectListItem {
Text = item.Name, Value = item.Value.ToString()
});
ArtistSortItems = MusicRepository.GetArtistSortItems().Select(item => new SelectListItem {
Text = item.Name, Value = item.Value.ToString()
});
SongSortItems = MusicRepository.GetSongSortItems().Select(item => new SelectListItem {
Text = item.Name, Value = item.Value.ToString()
});
}