Alternative handler

gistfile1.txt

        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request,
                                                                   CancellationToken cancellationToken)
        {
            var tcs = new TaskCompletionSource<HttpResponseMessage>();
            Interlocked.Increment(ref count);
            var response = new HttpResponseMessage(HttpStatusCode.OK)
                               {
                                   Content = new StringContent("HELLO WORLD")
                               };

            tcs.SetResult(response);
            return tcs.Task;
        }