Power BI data set not refreshing.

Hi All,

I have created an app over Azure and successfully fetched the access token. Now when I am using the C# code to refresh dataset in Power BI the function runs successfully without an error but still the dataset and report did not gets refresh. Please let me know if I am missing something. I am using SP online and Power BI web. Below is the code which I am using to refresh the data set.

  HttpWebRequest request;
            var url = "https://api.powerbi.com/v1.0/myorg/datasets/{0}/refreshes";
            request = System.Net.HttpWebRequest.CreateHttp(String.Format(url, datasetId));
            //POST web request to create a datasource.
            request.KeepAlive = true;
            request.Method = "POST";
            request.ContentLength = 0;
            //Add token to the request header
            request.Headers.Add("Authorization", String.Format("Bearer {0}", token));
            //Write JSON byte[] into a Stream
            using (Stream writer = request.GetRequestStream())
            {
                var response = (HttpWebResponse)request.GetResponse();
                Console.WriteLine("Dataset refresh request {0}", response.StatusCode.ToString());
            }

Thanks