public void UpdateCollections(IEnumerable <string> files)
{
TracksManager tracksManager = new TracksManager();
AddToCollection(Tracks, tracksManager.GetTracksList(files));
AddToCollection(Artists, tracksManager.GetArtists(Tracks));
AddToCollection(Albums, tracksManager.GetAlbums(Tracks));
CoreApp.InitializatePlayer(Tracks);
CoreApp.Player.CurrentTrackChanged += Player_CurrentTrackChanged;
CoreApp.Player.PositionChanged += Player_PositionChanged;
}