System.Net.Http.HttpClient.GeStringAsyncCore C# (CSharp) Method

        private async Task<string> GeStringAsyncCore(Task<HttpResponseMessage> getTask)
        {
            // Wait for the response message.
            using (HttpResponseMessage responseMessage = await getTask.ConfigureAwait(false))
            {
                // Make sure it completed successfully.
                responseMessage.EnsureSuccessStatusCode();

                // Get the response content.
                HttpContent c = responseMessage.Content;
                if (c != null)
                {
                    HttpContentHeaders headers = c.Headers;

                    // Since the underlying byte[] will never be exposed, we use an ArrayPool-backed
                    // stream to which we copy all of the data from the response.
                    using (Stream responseStream = await c.ReadAsStreamAsync().ConfigureAwait(false))
                    using (var buffer = new HttpContent.LimitArrayPoolWriteStream(_maxResponseContentBufferSize, (int)headers.ContentLength.GetValueOrDefault()))
                    {
                        await responseStream.CopyToAsync(buffer).ConfigureAwait(false);
                        if (buffer.Length > 0)
                        {
                            // Decode and return the data from the buffer.
                            return HttpContent.ReadBufferAsString(buffer.GetBuffer(), headers);
                        }
                    }
                }

                // No content to return.
                return string.Empty;
            }
        }