How stay connected?

using (var ws = new WebSocket("wss://data-fix.smt-data.com/lmax"))
            {
                ws.OnMessage += Ws_OnMessage;


                ws.OnOpen += Ws_OnOpen;
                ws.OnError += Ws_OnError;
                ws.OnClose += Ws_OnClose;
                ws.Connect();

                //ws.OnMessage += (sender, e) =>
               ws.Connect();
}

When i send data it automatically close socket. How stay connected and what when i receive new data from server?

Start with the WebSocket usage shown in the issue, including the event handlers and the two Connect calls. Inspect the close and error behavior around sending data; done means identifying why the socket closes and documenting or implementing the supported way to remain connected and receive server messages.