Binary stream 'NN' does not contain a valid BinaryHeader. Possible causes are invalid stream or obje
- by FinancialRadDeveloper
I am passing user defined classes over sockets.   The SendObject code is below.  It works on my local machine, but when I publish to the WebServer which is then communicating with the App Server on my own machine it fails.
    public bool SendObject(Object obj, ref string sErrMsg)
    {
        try
        {
            MemoryStream ms = new MemoryStream();
            BinaryFormatter bf1 = new BinaryFormatter();
            bf1.Serialize(ms, obj);
            byte[] byArr = ms.ToArray();
            int len = byArr.Length;
            m_socClient.Send(byArr);
            return true;
        }
        catch (Exception e)
        {
            sErrMsg = "SendObject Error: " + e.Message;
            return false;
        }
    }
I can do this fine if it is one class in my tools project and the other class about UserData just doesn't want to know.  Frustrating!
Ohh.   I think its because the UserData class has a DataSet inside it.  Funnily enough I have seen this work, but then after 1 request it goes loopy and I can't get it to work again. 
Anyone know why this might be?  I have looked at comparing the dlls to make sure they are the same on the WebServer and on my local machine and they look to be so as I have turned on versioning in the AssemblyInfo.cs to double check.
Edit:
Ok it seems that the problem is with size.  If I keep it under 1024 byes ( I am guessing here) it works on the web server and doesnt if it has a DataSet inside it.k  In fact this is so puzzling I converted the DataSet to a string using ds.GetXml() and this also causes it to blow up. :(   So it seems that across the network something with my sockets is wrong and doesn't want to read in the data. 
JonSkeet where are you.  ha ha.  I would offer Rep but I don't have any. Grr