private static async void Add()
{
string url = BASE_URL + "addition";
AdditionOperands additionOperands = new AdditionOperands();
HttpContent content;
HttpResponseMessage response = new HttpResponseMessage();
additionOperands.Addends = AskForOperands();
string json = JsonConvert.SerializeObject(additionOperands);
content = new StringContent(json, Encoding.UTF8, MyStaticData.MIME_TYPE_JSON);
response = await client.PostAsync(url, content);
Stream responseStream = await response.Content.ReadAsStreamAsync();
string streamContent = new StreamReader(responseStream).ReadToEnd();
AdditionResult resultJson = JsonConvert.DeserializeObject <AdditionResult>(streamContent);
Console.WriteLine(resultJson.ToString());
}
