Fixes dispose error (#27)

Author: mediabounds

Float.FileDownloader.Tests/DownloadRequest.Tests.cs

@@ -91,6 +91,7 @@ public async Task TestCustomHandler()
             DownloadRequest.DownloadMessageHandler = mock.Object;
             await DownloadRequest.Download(new HttpRequestMessage(HttpMethod.Get, TestUriString()), TempFilePath());
             mock.Protected().Verify("SendAsync", Times.AtLeastOnce(), ItExpr.IsAny<HttpRequestMessage>(), ItExpr.IsAny<CancellationToken>());
+            DownloadRequest.DownloadMessageHandler = null;
         }
     }
 }

Float.FileDownloader/DownloadRequest.cs

@@ -39,9 +39,8 @@ public static async Task<HttpResponseMessage> Download(HttpRequestMessage reques
             }
 
             var messageHandler = DownloadMessageHandler ?? new HttpClientHandler();
-            var shouldDisposeHandler = DownloadMessageHandler == null;
 
-            using (var client = new HttpClient(messageHandler, shouldDisposeHandler))
+            using (var client = new HttpClient(messageHandler))
             {
                 if (cancellationTokenSource == null)
                 {