ExchangeAlgorithmType Enumeration

static void AuthenticateCallback(IAsyncResult ar)
{
    SslStream stream = (SslStream) ar.AsyncState;
    try 
    {
        stream.EndAuthenticateAsClient(ar);
        Console.WriteLine("Authentication succeeded.");
        Console.WriteLine("Cipher: {0} strength {1}", stream.CipherAlgorithm, 
            stream.CipherStrength);
        Console.WriteLine("Hash: {0} strength {1}", 
            stream.HashAlgorithm, stream.HashStrength);
        Console.WriteLine("Key exchange: {0} strength {1}", 
            stream.KeyExchangeAlgorithm, stream.KeyExchangeStrength);
        Console.WriteLine("Protocol: {0}", stream.SslProtocol);
        // Encode a test message into a byte array. 
        // Signal the end of the message using the "<EOF>".
        byte[] message = Encoding.UTF8.GetBytes("Hello from the client.<EOF>");
        // Asynchronously send a message to the server.
        stream.BeginWrite(message, 0, message.Length, 
            new AsyncCallback(WriteCallback),
            stream);
    }
    catch (Exception authenticationException)
    {
        e = authenticationException;
        complete = true;
        return;
    }
}

static void AuthenticateCallback(IAsyncResult* ar)
{
    SslStream* stream = dynamic_cast<SslStream*> (ar->AsyncState);
    try 
    {
        stream->EndClientAuthenticate(ar);
        Console::WriteLine(S"Authentication succeeded.");
        Console::WriteLine(S"Cipher: {0} strength {1}", __box(stream->CipherAlgorithm), __box(stream->CipherStrength));
        Console::WriteLine(S"Hash: {0} strength {1}", __box(stream->HashAlgorithm), __box(stream->HashStrength));
        Console::WriteLine(S"Key exchange: {0} strength {1}", __box(stream->KeyExchangeAlgorithm), __box(stream->KeyExchangeStrength));
        Console::WriteLine(S"Protocol: {0}", __box(stream->SslProtocol));
        // Encode a test message into a byte array.
        // Signal the end of the message using the "<EOF>".
        Byte message[] = Encoding::UTF8->GetBytes(S"Hello from the client.<EOF>");
        // Asynchronously send a message to the server.
        stream->BeginWrite(message, 0, message->Length, 
            new AsyncCallback(WriteCallback),
            stream);
    }
    catch (Exception* authenticationException)
    {
        e = authenticationException;
        complete = true;
        return;
    }
}