hi, this is may code:
var code = 'xxxxxxx';
var client = new HttpClient();
var url = string.Format("https://api.dropboxapi.com/oauth2/token?code={0}&grant_type={1}", code, "authorization_code");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
//GET Method
HttpResponseMessage response = await client.GetAsync(url);
but the response is: 405 method not allowed
any help ?