private async void OpenWithExecute(FileInfo fileToOpen)
 {
     if (fileToOpen.ExtractedStorageFile != null)
     {
         var options = new Windows.System.LauncherOptions();
         options.DisplayApplicationPicker = true;
         await Windows.System.Launcher.LaunchFileAsync(fileToOpen.ExtractedStorageFile, options);
     }
 }
 private async void OpenFileByDefaultProgramExecute(FileInfo fileToOpen)
 {
     if (fileToOpen.ExtractedStorageFile != null)
     {
         await Windows.System.Launcher.LaunchFileAsync(fileToOpen.ExtractedStorageFile);
     }
 }