var message = new BrokeredMessage(objMess.MessageBody);

var reader = new StreamReader(receivedMessage.GetBody<Stream>());

@string3http://schemas.microsoft.com/2003/10/Serialization/�  .
Rest of Message Body

private BrokeredMessage GetBrokeredMessageWithBody(object body)
{
    var json = JsonConvert.SerializeObject(body);
    return new BrokeredMessage(GenerateStreamFromString(json));
}

private Stream GenerateStreamFromString(string s)
{
    var stream = new MemoryStream();
    var writer = new StreamWriter(stream);
    writer.Write(s);
    writer.Flush();
    stream.Position = 0;
    return stream;
}