Hi,

I got a NullReferenceException in the class SocketController in the method:

TransferItem EndReceive(IAsyncResult ar)

at the line :
if (ar != m_ActiveReceive.AsyncResult)

the "ActiveReceive" is null !

What I do in my program:
-------------------------
I call "ChangeSecurityProtocol" during usage. Maybe I have something to synchronize, but really I understand nothing about theses classes code !

Can you help me ?

Thanks

It appears you are executing the method Receive (or BeginReceive/EndReceive) while calling ChangeSecurityProtocol. You shouldn't do this (cfr remarks section in the documentation of ChangeSecurityProtocol).

You're right...

The problem is that one thread call
BeginReceive to continue listening on the socket.

After, another thread process the message and detect that we must use TLS.

How can I stop the previous BeginReceive before change security procotol ?

Thanks for your help