private void UpdateAvailableVersions() { var currentUpdateInfo = _currentRepository.UpdateCurrentVersion( _currentInstallation.LastVersion ?? _currentInstallation.InstalledVersion); if (_currentRepository.UpdateReleases != null) { btnInstall.Enabled = currentUpdateInfo != null; cbVersions.DataSource = _currentRepository.UpdateReleases; cbVersions.SelectedItem = currentUpdateInfo; } else { btnInstall.Enabled = false; cbVersions.DataSource = new[] { Resources.Localization_Press_Refresh_Button }; } }