public async Task <FdaLabelSearchResults> SearchAsync(FdaLabelSearchOptions fdaLabelSearchOptions, PagingSortingOptions pagingOptions = null, string joiner = "AND") { if (pagingOptions == null) { pagingOptions = new PagingSortingOptions(); } var parameterDictionary = new ParameterDictionary { { "search", fdaLabelSearchOptions.ToQuery(joiner) } }; if (pagingOptions.Limit != 0) { parameterDictionary.Add("limit", pagingOptions.Limit.ToString()); } if (pagingOptions.Skip != 0) { parameterDictionary.Add("skip", pagingOptions.Skip.ToString()); } if (!string.IsNullOrEmpty(_apiKey)) { parameterDictionary.Add("api_key", _apiKey); } var json = await GetAsync($"/drug/label.json?{parameterDictionary.ToQueryString()}"); return(FdaLabelSearchResults.FromJson(json)); }