public sealed class ParcelRecord : ArcGIS.Desktop.Framework.Contracts.PropertyChangedBase, System.ComponentModel.INotifyPropertyChanged  

{
  string errorMessage = await QueuedTask.Run(() =>
  {
    try
    {
      var myParcelFabricLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<ParcelLayer>().FirstOrDefault();
      //if there is no fabric in the map then bail
      if (myParcelFabricLayer == null)
        return "There is no fabric in the map.";
      var theActiveRecord = myParcelFabricLayer.GetActiveRecord();
      if (theActiveRecord == null)
        return "There is no Active Record. Please set the active record and try again.";
    }
    catch (Exception ex)
    {
      return ex.Message;
    }
    return "";
  });
  if (!string.IsNullOrEmpty(errorMessage))
    MessageBox.Show(errorMessage, "Get Active Record.");
}