public void Save([CanBeNull] AppSettingsDto settingsDto = null)
 {
     _storage?.SaveSettings(settingsDto ?? _settingsDto);
 }
 public ApplicationSettingsManager(IApplicationSettingsStorage <AppSettingsDto> applicationSettingsStorage)
 {
     _storage     = applicationSettingsStorage;
     _settingsDto = _storage?.LoadSettings() ?? new AppSettingsDto();
 }