public sealed class ParcelFabric : ArcGIS.Core.Data.Dataset, System.IDisposable  

{
  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 myParcelFabricDataset = myParcelFabricLayer.GetParcelFabric();
    }
    catch (Exception ex)
    {
      return ex.Message;
    }
    return "";
  });
  if (!string.IsNullOrEmpty(errorMessage))
    MessageBox.Show(errorMessage, "Get Parcel Fabric Dataset from layer.");
}

{
  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 myParcelFabricDataset = myParcelFabricLayer.GetParcelFabric();
      var myTopology = myParcelFabricDataset.GetParcelTopology();
    }
    catch (Exception ex)
    {
      return ex.Message;
    }
    return "";
  });
  if (!string.IsNullOrEmpty(errorMessage))
    MessageBox.Show(errorMessage, "Get Parcel Fabric Topology.");
}

{
  var parcelFabricDataset = await QueuedTask.Run(() =>
  {
    ParcelFabric myParcelFabricDataset = null;
    if (table.IsControllerDatasetSupported())
    {
      // Tables can belong to multiple controller datasets, but at most one of them will be a parcel fabric

      IReadOnlyList<Dataset> controllerDatasets = table.GetControllerDatasets();
      foreach (Dataset controllerDataset in controllerDatasets)
      {
        if (controllerDataset is ParcelFabric)
        {
          myParcelFabricDataset = controllerDataset as ParcelFabric;
        }
        else
        {
          controllerDataset.Dispose();
        }
      }
    }
    return myParcelFabricDataset;
  });
}