Microsoft.AspNetCore.SignalR.WebSockets.WebSocketHandler.CloseAsync C# (CSharp) Method

        public virtual Task CloseAsync()
        {
            if (IsClosedOrClosedSent(WebSocket))
            {
                return TaskAsyncHelper.Empty;
            }

            var closeContext = new CloseContext(this);

            return _sendQueue.Enqueue(async state =>
            {
                var context = (CloseContext)state;

                if (IsClosedOrClosedSent(context.Handler.WebSocket))
                {
                    return;
                }

                try
                {
                    await context.Handler.WebSocket
                        .CloseOutputAsync(WebSocketCloseStatus.NormalClosure, "", CancellationToken.None)
                        .PreserveCulture();
                }
                catch (Exception ex)
                {
                    // Swallow exceptions on close
                    _logger.LogError("Error while closing the websocket: " + ex);
                }
            },
            closeContext);
        }