how to close network stream connection properly?

Question

I have an application that is connecting to some network server (tcp) and is connected using a network stream:

if (!SSL)
{
     _networkStream = new System.Net.Sockets.TcpClient(Server, Port).GetStream();
     _StreamWriter = new System.IO.StreamWriter(_networkStream);
     _StreamReader = new System.IO.StreamReader(_networkStream, Encoding.UTF8);
}

if (SSL)
{
     System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient(Server, Port);
     _networkSsl = new System.Net.Security.SslStream(client.GetStream(), false,
                    new System.Net.Security.RemoteCertificateValidationCallback(Protocol.ValidateServerCertificate), null);
     _networkSsl.AuthenticateAsClient(Server);
     _StreamWriter = new System.IO.StreamWriter(_networkSsl);
     _StreamReader = new System.IO.StreamReader(_networkSsl, Encoding.UTF8);
}

///// since now I working with both reader and writer globally in multiple threads

I am using reader and writer asynchronously (in 2 threads) and I need to have both of these streams globally available (they are defined as public references on class level), so I don't know if using statement can be used here.

How should I properly close this connection? All objects (NetworkStream, stream writer and reader) have the Close() method. Should I call it for all of them? Or only 1 of them? Is there any need to release some resources?

Answer 1

Put them in a using block. It will close and dispose of each stream appropriately after the operation has been completed.

using (StreamReader reader = new StreamReader(_networkStream, Encoding.UTF8)) 
{

}