System.Net.Http.DelegatingHandler.SendAsync C# (CSharp) Method

        protected internal override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            if (request == null)
            {
                throw new ArgumentNullException(nameof(request), SR.net_http_handler_norequest);
            }
            SetOperationStarted();
            return _innerHandler.SendAsync(request, cancellationToken);
        }