using (var client = new Client (username, password)) {

        var request = new SearchRequest {
            ExpertQuery = "TI ~ privacy",
            SearchLanguage = Language.en,
            PageSize = 10,
            Page = 1
        };

        var response = await client.DoQueryAsync (request);

        var title = response.Results [0].Content.Notice.Expression?.Title [0].Value;

        ...
    }