Observable.FromAsync used

C-UI/SCU_Store.cs

@@ -26,13 +26,13 @@ namespace C_UI
             var client = new DicomClient(inputsDto.ServerHost, inputsDto.Port, false, inputsDto.ServerAET, inputsDto.Aet);
             client.NegotiateAsyncOps();
             inputsDto.FileNames.ToObservable()
-                .Select(fileName => new Task(async () =>
+                .Select(fileName => Observable.FromAsync(async () =>
                  {
                      var request = new DicomCStoreRequest(fileName);
                      request.OnResponseReceived += (req, response) => logger.Info($"{response.Status}-{fileName}");
                      await client.AddRequestAsync(request);
                      await client.SendAsync();
-                 }).ToObservable().Select(x => fileName))
+                 }).Select(x => fileName))
                 .Concat()
                 .Subscribe(
                     filename =>