private async Task <Guid> GetCurrentThemeAsync(CancellationToken cancellationToken) { const string COLLECTION_NAME = @"ApplicationPrivateSettings\Microsoft\VisualStudio"; const string PROPERTY_NAME = "ColorTheme"; await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken); IVsSettingsManager manager = (IVsSettingsManager)await VS.Services.GetSettingsManagerAsync(); SettingsStore store = new ShellSettingsManager(manager).GetReadOnlySettingsStore(SettingsScope.UserSettings); if (store.CollectionExists(COLLECTION_NAME)) { if (store.PropertyExists(COLLECTION_NAME, PROPERTY_NAME)) { // The value is made up of three parts, separated // by a star. The third part is the GUID of the theme. string[] parts = store.GetString(COLLECTION_NAME, PROPERTY_NAME).Split('*'); if (parts.Length == 3) { if (Guid.TryParse(parts[2], out Guid value)) { return(value); } } } } return(Guid.Empty); }