Windows Phone 7 Facebook Image Posting Issue - facebook

Question

I know these facebook api stuffs are really became a pain in the ass, after from my longer searches on internet, I could only find a message post API to facebook. I just want to modify it for both message and image posting. Here is relevant code which posts a message to facebook.(Windows Phone 7)
private void PostToWall_Click(object sender, RoutedEventArgs e)
{
if (string.IsNullOrEmpty(txtMessage.Text))
{
MessageBox.Show("Enter message.");
return;
}
var fb = new FacebookClient(_accessToken);
fb.PostCompleted += (o, args) =>
{
if (args.Error != null)
{
Dispatcher.BeginInvoke(() => MessageBox.Show(args.Error.Message));
return;
}
var result = (IDictionary<string, object>)args.GetResultData();
_lastMessageId = (string)result["id"];
Dispatcher.BeginInvoke(() =>
{
MessageBox.Show("Message Posted successfully");
txtMessage.Text = string.Empty;
btnDeleteLastMessage.IsEnabled = true;
});
};
var parameters = new Dictionary<string, object>();
parameters["message"] = txtMessage.Text;
fb.PostAsync("me/feed", parameters);
}
and I have also found a image post code, but I could not integrate it into my code. I think methods are not appropriate with each other.
Here is image post code;
var photo = new WriteableBitmap(0, 0).FromResource("Background200x200.jpg");
FacebookClient app = new FacebookClient();
IDictionary<string, object> parameters = new Dictionary<string, object>();
parameters["access_token"] = _facebookAccessToken; //set in another method where I authenticate...
parameters["name"] = "my picture";
parameters["message"] = "this is a picture uploaded from my the facebook sdk";
var mediaObject = new FacebookMediaObject {
FileName = "Background200x200.jpg",
ContentType = "image/jpeg",
};
mediaObject.SetValue(photo.ToByteArray());
parameters["source"] = mediaObject;
app.ApiAsync(
UploadComplete,
null,
"https://graph.facebook.com/me/feed",
parameters,
HttpMethod.Post);
I just want to post an image with a message. And If you can give me a sample link which posts an image to facebook (I ve been seeking for a ready-coded image post application,that is, Visual studio solution file which I can compile it and XAP it, and run on my phone)
or If you can help me to evolve my message poster to image poster, I would be really pleasured.
THANKS