Hi. I have tried to call post request  by HttpClient and got exception “”Couldn’t resolve host name””  This happens only on real device on emulator all is ok. 

I write for tizen os at first time and don’t know what could be happened. 
Privileges were added.
 

Tizen version “4.0”; Device “Galaxy Watch SM-R810” 

HttpClient httpClient = new HttpClient();
            string data = null;
            try
            {
                httpClient.DefaultRequestHeaders
                      .Accept
                      .Add(new MediaTypeWithQualityHeaderValue(“application/json”));
                httpClient.Timeout = new TimeSpan(0, 1, 0);
                HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, “RequsetUrl”);
                var requestContent = new StringContent(content,
                                                    Encoding.UTF8,
                                                    “application/json”);//CONTEN
                var result = await httpClient.PostAsync(url, requestContent);
                data = await result.Content.ReadAsStringAsync();
                Console.WriteLine(“\n\n  GetDataFromWeb() Exception Caught!”);
            }
            catch (HttpRequestException ex)
            {
                Console.WriteLine(“\n\n  GetDataFromWeb() Exception Caught!”);
                Console.WriteLine(“Message: {0}, StackTrace: {1}, InnerException: {2}”, ex.Message, ex.StackTrace, ex.InnerException.Message);
            }
            return data;