post data to API

Question

I am trying to post data to my API. Could anyone tell me where I missing??

I am getting error at:

 

responseFinal = client.PutAsJsonAsync("apiName/api/blabla", data).Result;

 

Here is my code:

var client = new HttpClient();

client.BaseAddress = new Uri("http://Ipaddress/apiName");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

client.DefaultRequestHeaders.Authorization = CreateBasicHeader(userName, password);

var data = new
{
data = "0001"
};

HttpResponseMessage responseFinal = null;

responseFinal = client.PutAsJsonAsync("apiName/api/blabla", data).Result;  // I am getting error

Advance thanks,

Darma