using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json; // Install Newtonsoft.Json with NuGet

namespace ConsoleApp1
{
     class Program
     {
          // my settings !!!
          private static readonly string endpoint = "https://api.cognitive.microsofttranslator.com/";
          private static readonly string subscriptionKey = "568af7141d8e4f309f712d.............";
          private static readonly string location = "westeurope";

          // program
          static async Task Main(string[] args)
          {
               // Input and output languages are defined as parameters.
               string route = "/translate?api-version=3.0&from=en&to=de&to=it";
               string textToTranslate = "Hello, world!";
               object[] body = new object[] { new { Text = textToTranslate } };
               var requestBody = JsonConvert.SerializeObject(body);

               using (var client = new HttpClient())
               using (var request = new HttpRequestMessage())
               {
                    // Build the request.
                    request.Method = HttpMethod.Post;
                    request.RequestUri = new Uri(endpoint + route);
                    request.Content = new StringContent(requestBody, Encoding.UTF8, "application/json");
                    request.Headers.Add("Ocp-Apim-Subscription-Key", subscriptionKey);
                    request.Headers.Add("Ocp-Apim-Subscription-Region", location);

                    // Send the request and get response.
                    HttpResponseMessage response = await client.SendAsync(request).ConfigureAwait(false);
                    // Read response as a string.
                    string result = await response.Content.ReadAsStringAsync();
                    Console.WriteLine(result);
               }
          }
     }
}