C# - Passing An Exception To An HttpHandler?

I am trying to pass an exception to an HttpHandler by doing the following:

catch (Exception e)
{
byte[] exceptionData;
MemoryStream stream = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.Persistence));
formatter.Serialize(stream, e);
exceptionData = stream.ToArray();
WebClient client = new WebClient();
Uri handler = new Uri(ApplicationUri, "TransferException.axd");
#if DEBUG
ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(BypassAllCertificateStuff);
#endif
try
{
client.UploadData(handler, exceptionData);
}
catch (WebException) { }
}

EDIT

I am getting the following exception on the client.UploadData() line.
"Content-Length or Chunked Encoding cannot be set for an operation that does not write data."

EDIT

Even if I change my call to be client.UploadString(location, "THIS IS A TEST!"); it still fails with the same exception.