private void OnFileDownloaded() { RunOnUiThread(() => { openFileButton.Enabled = true; }; Toast.MakeText(this, "File downloaded", ToastLength.Short).Show(); // Notify the user about the completed "download" var downloadManager = DownloadManager.FromContext(Application.Context); var filePath = downloadViewModel.GetDownloadedFilePath(); downloadManager.AddCompletedDownload(filePath, "myDescription", true, GetFileType(filePath), filePath, File.ReadAllBytes(filePath).Length, true); }