public TunesLibraryAdapter(PreferencesFile preferencesFile, LibraryFile libraryFile)
 {
     _preferencesFile = preferencesFile;
     _libraryFile = libraryFile;
 }
 public TunesLibraryAdapter()
 {
     _preferencesFileSource = new PreferencesFileSource();
     _preferencesFile = new PreferencesFile(_preferencesFileSource);
     _libraryFile = new LibraryFile(_preferencesFile.LibraryLocation);
 }