How to post messages to yammer private network - windows-phone-8

Question

I want to post messages to yammer in different network. For this I have wrote the below code ,
it's giving the server not found exception.
rawtoken = Security.GetRawToken();
//TODO
//get list of Yammer tokens for this user
WebClient wc = new System.Net.WebClient();
wc.DownloadStringCompleted += wc_DownloadStringCompleted;
wc.DownloadStringAsync(new Uri("https://www.yammer.com/api/v1/oauth/tokens.json?access_token=" + rawtoken));
void wc_DownloadStringCompleted(object sender, System.Net.DownloadStringCompletedEventArgs e)
{
string tokens = e.Result;
MessageBox.Show(tokens);
List<Response> myDeserializedObjList = (List<Response>)Newtonsoft.Json.JsonConvert.DeserializeObject(tokens,typeof(List<Response>));
List<Response> response = myDeserializedObjList.Where(item => item.network_id == "992371").ToList();
accessToken = response[0].token;
WebClient wc = new System.Net.WebClient();
Uri uri = new Uri("https://www.yammer.com/api/v1/messages.json?access_token=" + accessToken);
student ns = new student();
// wc.Headers["Authorization"] = "Bearer " + accessToken; //use discoEN token here
String data = "group-id=" + ns.group_id + "&body=" + ns.body;
wc.UploadStringCompleted += new UploadStringCompletedEventHandler(wc_UploadStringCompleted);
wc.Headers["Content-Type"] = "application/x-www-form-urlencoded";
wc.Encoding = Encoding.UTF8;
wc.UploadStringTaskAsync(uri, data);
}
private void wc_UploadStringCompleted(object sender, UploadStringCompletedEventArgs e)
{
MessageBox.Show(e.Result);
}

Answer 1

You should use the SDK for Windows Mobile rather than rolling your own code. It is available from the Yammer Developer site. Your code also passes the token on a URL parameter. This is no longer supported and you need to pass it on the authentication header.
A ServerNotFoundException highlights a connectivity problem. Perhaps you are not connected to the network, cannot route connections, or cannot resolve www.yammer.com via DNS.