System.Net.WebSockets.WebSocketHttpListenerDuplexStream.SwitchToOpaqueMode C# (CSharp) Method

        public void SwitchToOpaqueMode(WebSocketBase webSocket)
        {
            Debug.Assert(webSocket != null, "'webSocket' MUST NOT be NULL.");
            Debug.Assert(_outputStream != null, "'m_OutputStream' MUST NOT be NULL.");
            Debug.Assert(_outputStream.InternalHttpContext != null,
                "'m_OutputStream.InternalHttpContext' MUST NOT be NULL.");
            Debug.Assert(_outputStream.InternalHttpContext.Response != null,
                "'m_OutputStream.InternalHttpContext.Response' MUST NOT be NULL.");
            Debug.Assert(_outputStream.InternalHttpContext.Response.SentHeaders,
                "Headers MUST have been sent at this point.");
            Debug.Assert(!_inOpaqueMode, "SwitchToOpaqueMode MUST NOT be called multiple times.");

            if (_inOpaqueMode)
            {
                throw new InvalidOperationException();
            }

            _webSocket = webSocket;
            _inOpaqueMode = true;
            _readEventArgs = new HttpListenerAsyncEventArgs(webSocket, this);
            _readEventArgs.Completed += s_OnReadCompleted;
            _writeEventArgs = new HttpListenerAsyncEventArgs(webSocket, this);
            _writeEventArgs.Completed += s_OnWriteCompleted;

            if (NetEventSource.IsEnabled)
            {
                NetEventSource.Associate(this, webSocket);
            }
        }