private async void categories_categorySeriesButton_Click(object sender, EventArgs e) { CategorySeries api = new CategorySeries { ApiKey = apiKey }; api.Arguments.category_id = 125; if (fredValidationButton.Checked) { api.Arguments.Validators.Clear(); } SeriesContainer container = syncButton.Checked ? api.Fetch() : await api.FetchAsync(); ShowResults(api); }