private async void SendDataToApi(studentdata per)
        {
            using (HttpClient client = new HttpClient())
            {
                client.BaseAddress = new Uri("http://localhost:13713/");
                string endPoint = "api/person";

                string json = JsonConvert.SerializeObject(per);

                var data = new StringContent(content: json,
                                             encoding: Encoding.UTF8,
                                             mediaType: "application/json");

                var res = await client.PostAsync(endPoint, data);

                MessageBox.Show("Data Inserted");
            }
        }
/*        private void putdata()
 *      {
 *          using (var client = new HttpClient())
 *          {
 *         //     Person p = new Person { person_name = "Sourav",  = "Kayal" };
 *              client.BaseAddress = new Uri("http://localhost:1565/");
 *              var response = client.PutAsJsonAsync("api/person", p).Result;
 *              if (response.IsSuccessStatusCode)
 *              {
 *                  Console.Write("Success");
 *              }
 *          }
 *
 */     private void getdata(int id)
        {
            HttpClient client = new HttpClient();

            client.BaseAddress = new Uri("http://localhost:13713/");
            // Add an Accept header for JSON format.
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            // List all Names.
            HttpResponseMessage response = client.GetAsync("api/person/4").Result;  // Blocking call!

            if (response.IsSuccessStatusCode)
            {
                var products = response.Content.ReadAsStringAsync().Result;

                studentdata crs = JsonConvert.DeserializeObject <studentdata>(products);


                MessageBox.Show(crs.Id.ToString());
            }
        }