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How do I know if a client disconnected?

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I am making a server in c#
I am using TCPClient for the client objects

This is my code for reading data from a client

NetworkStream netStream = Client.GetStream();
if (netStream.CanRead)
RecvPacket packet = new RecvPacket();
if ((int)Client.Available < 4) return false;

byte[] header = new byte[4];
netStream.Read(header, 0, 4);


I have read that a any read that returns a 0 bytes, means the connection is closed.
So how is this done with NetworkStream?

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