Strange Status Code From Apple Receipt Verification Sandbox - iphone

Question

I make a post request of base64 encoded data to the receipt verification address as follows (this is in C#):
var postSerializer = new JavaScriptSerializer();
byte[] toEncodeAsBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(Receipt);
string returnValue = System.Convert.ToBase64String(toEncodeAsBytes);
var temp = new Dictionary<string, string>();
temp.Add("receipt-data", returnValue);
string jsonReceipt = postSerializer.Serialize(temp);
request.Method = "POST";
request.ContentType = "application/json";
byte[] postBytes = System.Text.Encoding.ASCII.GetBytes(jsonReceipt);
request.ContentLength = postBytes.Length;
Stream dataStream = request.GetRequestStream();
// Write the data to the request stream.
dataStream.Write(postBytes, 0, postBytes.Length);
// Close the Stream object.
dataStream.Close();
WebResponse response = request.GetResponse();
// Display the status.
Console.WriteLine(((HttpWebResponse)response).StatusDescription);
// Get the stream containing content returned by the server.
dataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader(dataStream);
// Read the content.
string responseFromServer = reader.ReadToEnd();
I'm pretty sure things are in the right format because I'm not getting any exceptions back
from the apple receipt verification endpoint. The entirety of the response I get back is
{status : -42352}
And I can't find out what this error means anywhere. Does anyone know what this means or if there's an error in my code?

Answer 1

Just solved the same problem. Got the solution from here: Verify receipt for in App purchase
The problem was in post encoding. When I encoded post on my server using
$receipt = json_encode(array("receipt-data" => base64_encode($receiptdata)));
I had the same -42352 status. When I used my own function for encoding on iPhone - everything worked! Magic...