REST Windows Phone Photo upload -

i'm trying upload photo rest api in windows phone 7 application using restsharp gets/posts.
post parameters follows:

photo: photo, encoded multipart/form-data
photo_album_id: identifier of existing photo album, may event or group album

i've created request, every time "{\"details\":\"missing photo parameter\",\"problem\":\"the api request malformed\"}\n

my photo parameter looks this:

"---------------------------8cd9bfbafb3ca00\r\ncontent-disposition: form-data; name=\"filename\"; filename=\"somefile.jpg\"\r\ncontent-type: image/jpg\r\n\r\n(some binary junk listed here)\r\n-----------------------------8cd9bfbafb3ca00--"

i'm not quite sure if it's problem how i'm presenting binary data image (currently in phototaskcompleted event, read contents of e.chosenphoto byte[] , pass helper method create form data) or if don't create form correctly.

i'm trying simple possible, can refactor once know how works.

 void imageobtained(object sender, photoresult e)     {          var photo = readtoend(e.chosenphoto);         var form = postform(photo);         var request = new requestwrapper("photo", method.post);         request.addparameter("photo_album_id", _album.album_id);         request.addparameter("photo", form);          request.client.executeasync<object>(request, (response) =>           {                var s = response.data;           });     }      private string createboundary()     {         return "---------------------------" + datetime.now.ticks.tostring("x");      }      private string postform(byte[] data)     {         string boundary = createboundary();         stringbuilder post = new stringbuilder();         post.append(boundary);         post.append("\r\n");         post.append("content-disposition: form-data; name=\"filename\"; filename=\"somefile.jpg\"");         post.append("\r\n");         post.append("content-type: image/jpg");         post.append("\r\n\r\n");         post.append(convertbytestostring(data));         post.append("\r\n");         post.append("--");         post.append(boundary);         post.append("--");          return post.tostring();     }      public static string convertbytestostring(byte[] bytes)     {         string output = string.empty;         memorystream stream = new memorystream(bytes);         stream.position = 0;         using (streamreader reader = new streamreader(stream))         {             output = reader.readtoend();         }          return output;     } 

hammock windows phone makes real simple. add file request using addfile method , pass photo stream.

        var request = new restrequest("photo", webmethod.post);         request.addparameter("photo_album_id", _album.album_id);         request.addfile("photo", filename, e.chosenphoto);