GetTranslatedText.cs

public string getTranslatedText(string text)
    {
        string host = "https://api.cognitive.microsofttranslator.com";
        string route = "/translate?api-version=3.0&to=en";
        string translatedText = "";

        System.Object[] body = new System.Object[] { new { Text = text } };
        var requestBody = JsonConvert.SerializeObject(body);

        using (var client = new HttpClient())
        using (var request = new HttpRequestMessage())
        {
            // Set the method to POST
            request.Method = HttpMethod.Post;

            // Construct the full URI
            request.RequestUri = new Uri(host + route);

            // Add the serialized JSON object to your request
            request.Content = new StringContent(requestBody, Encoding.UTF8, "application/json");

            // Add the authorization header
            request.Headers.Add("Ocp-Apim-Subscription-Key", ConfigurationManager.AppSettings["TranslatorTextSubKey"]);

            // Send request, get response
            var response = client.SendAsync(request).Result;
            var jsonResponse = response.Content.ReadAsStringAsync().Result;

            // Print the response
            log.Info(jsonResponse);
            JArray result = JArray.Parse(jsonResponse);
            log.Info(result[0].ToString());
            TranslatedResult translatorObj = JsonConvert.DeserializeObject<TranslatedResult>(result[0].ToString());
            foreach(var translate in translatorObj.Translations)
            {
                log.Info($"Translate text {translate.Text}");
                translatedText = translate.Text;
            }
        }
        return translatedText;
    }