A HttpClient vs Webclient implementation

Author: rgesteve

docs/samples/Microsoft.ML.Samples/Dynamic/TensorFlow/ImageClassification.cs

@@ -2,7 +2,9 @@
 using System.IO;
 using System.Linq;
 using System.Net;
+using System.Net.Http;
 using System.Text;
+using System.Threading.Tasks;
 using ICSharpCode.SharpZipLib.GZip;
 using ICSharpCode.SharpZipLib.Tar;
 using Microsoft.ML;
@@ -113,10 +115,18 @@ class OutputScores
 
         private static string Download(string baseGitPath, string dataFile)
         {
+#if false
             using (WebClient client = new WebClient())
             {
                 client.DownloadFile(new Uri($"{baseGitPath}"), dataFile);
             }
+#else
+            var httpClient = new HttpClient();
+            using (var file = File.OpenWrite(dataFile))
+            {
+                httpClient.GetStreamAsync(baseGitPath).ContinueWith((Task<Stream> t) => t.Result.CopyToAsync(file));
+            }
+#endif
 
             return dataFile;
         }