public static PlaylistViewModel getInstance() { if (instance == null) { instance = new PlaylistViewModel(); } return instance; }
public ManagerViewModel() { timer.Interval = TimeSpan.FromSeconds(1); timer.Tick += updateTime; if (!File.Exists(Helper.xmlFolder + "/playlist.xml")) { createXmlFile(); } _playlistController = new PlaylistViewModel(); _libraryController = new LibraryViewModel(); }