private WebSocket websocket;

    [TestMethod]
    public void TestConnection_WhenPutCommandFirst_ExpectedCorrectResult()
    {
        //ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

        websocket = new WebSocket(uri: webSocketHost);
        websocket.Opened += new EventHandler(websocket_Opened);
        websocket.Error += new EventHandler<SuperSocket.ClientEngine.ErrorEventArgs>(websocket_Error);
        websocket.Closed += new EventHandler(websocket_Closed);
        websocket.MessageReceived += new EventHandler<MessageReceivedEventArgs>(websocket_MessageReceived);
        websocket.Open();

        while (websocket.State == WebSocketState.Connecting)
        {
            Thread.Sleep(500);
        }
    }

    void websocket_Opened(object sender, EventArgs e)
    {
        Debug.WriteLine($"Websocket opened");
        this.websocket.Send($"{echoCommand}");

    }

    void websocket_MessageReceived(object sender, MessageReceivedEventArgs e)
    {
        Debug.WriteLine($"Message received: {e.Message}");
    }

    void websocket_Error(object sender, SuperSocket.ClientEngine.ErrorEventArgs e)
    {
        Debug.WriteLine($"Error: {e.Exception.Message}");
    }

    private void websocket_Closed(object sender, EventArgs e)
    {
        Debug.WriteLine($"Websocket closed: {e}");
    }
}`