Asp.net HttpClient POST Method call API

string response = null;

            using (var client = new HttpClient())

            {

                client.BaseAddress = new Uri(BASE_URL);

                var content = new FormUrlEncodedContent(new[]

                    {

                        new KeyValuePair<string, string>("param1", value1),

                        new KeyValuePair<string, string>("param2", value2),

                    });

                var result = client.PostAsync(API_URL, content).Result;

                response = result.Content.ReadAsStringAsync().Result;

              

            }

here BASE_URL is some thing like www.mastermoin.com

and API_URL is looking like /api/helloservice