public sealed class ParcelLayer : CompositeLayer, ArcGIS.Desktop.Core.IMetadataInfo, ILayerContainer, IMetadataSource, System.ComponentModel.INotifyPropertyChanged  

string path = @"C:\MyTestData\MyFileGeodatabase.gdb\MyFeatureDS\MyFabric";
await QueuedTask.Run(() =>
{
  var lyrCreateParams = new ParcelLayerCreationParams(new Uri(path));
  try
  {
    var parcelLayer = LayerFactory.Instance.CreateLayer<ParcelLayer>(
      lyrCreateParams, MapView.Active.Map);
  }
  catch (Exception ex)
  {
    MessageBox.Show(ex.Message, "Add Parcel Fabric 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 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.");
}

{
  string errorMessage = await QueuedTask.Run(async () =>
  {
    try
    {
      string sExistingRecord = "MyRecordName";
      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.";

      bool bSuccess = await myParcelFabricLayer.SetActiveRecordAsync(sExistingRecord);
      if (!bSuccess)
        return "No record called " + sExistingRecord + " was found.";
    }
    catch (Exception ex)
    {
      return ex.Message;
    }
    return "";
  });
  if (!string.IsNullOrEmpty(errorMessage))
    MessageBox.Show(errorMessage, "Set Active Record.");
}