public static ParcelRecord GetActiveRecord( 
   ParcelLayer parcelLayer
)

{
  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(() =>
 {
   //check for selected layer
   if (MapView.Active.GetSelectedLayers().Count == 0)
     return "Please select a source feature layer in the table of contents.";
   //first get the feature layer that's selected in the table of contents
   var srcFeatLyr = MapView.Active.GetSelectedLayers().OfType<FeatureLayer>().FirstOrDefault();
   var myParcelFabricLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<ParcelLayer>().FirstOrDefault();
   if (myParcelFabricLayer == null)
     return "No parcel layer found in the map.";
   try
   {
     var theActiveRecord = myParcelFabricLayer.GetActiveRecord();
     if (theActiveRecord == null)
       return "There is no Active Record. Please set the active record and try again.";
     var editOper = new EditOperation()
     {
       Name = "Assign Features to Record",
       ProgressMessage = "Assign Features to Record...",
       ShowModalMessageAfterFailure = true,
       SelectNewFeatures = true,
       SelectModifiedFeatures = false
     };
     //add parcel type layers and their feature ids to a new Dictionary
     var ids = new List<long>(srcFeatLyr.GetSelection().GetObjectIDs());
     var sourceFeatures = new Dictionary<MapMember, List<long>>
     {
       { srcFeatLyr, ids }
     };
     editOper.AssignFeaturesToRecord(myParcelFabricLayer,
       SelectionSet.FromDictionary(sourceFeatures), theActiveRecord);
     if (!editOper.Execute())
       return editOper.ErrorMessage;
   }
   catch (Exception ex)
   {
     return ex.Message;
   }
   return "";
 });
  if (!string.IsNullOrEmpty(errorMessage))
    MessageBox.Show(errorMessage, "Assign Features To Record.");
}

try
{
  var theActiveRecord = myParcelFabricLayer.GetActiveRecord();
  if (theActiveRecord == null)
    return "There is no Active Record. Please set the active record and try again.";

  var guid = theActiveRecord.Guid;
  var editOper = new EditOperation()
  {
    Name = "Create Parcel Seeds",
    ProgressMessage = "Create Parcel Seeds...",
    ShowModalMessageAfterFailure = true,
    SelectNewFeatures = true,
    SelectModifiedFeatures = false
  };
  editOper.CreateParcelSeedsByRecord(myParcelFabricLayer, guid, MapView.Active.Extent);
  if (!editOper.Execute())
    return editOper.ErrorMessage;
}
catch (Exception ex)
{
  return ex.Message;
}
return "";

try
{
  var myParcelFabricLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<ParcelLayer>().FirstOrDefault();
  if (myParcelFabricLayer == null)
    return "Parcel layer not found in map.";

  var theActiveRecord = myParcelFabricLayer.GetActiveRecord();
  var guid = theActiveRecord.Guid;
  var editOper = new EditOperation()
  {
    Name = "Build Parcels",
    ProgressMessage = "Build Parcels...",
    ShowModalMessageAfterFailure = true,
    SelectNewFeatures = true,
    SelectModifiedFeatures = true
  };
  editOper.BuildParcelsByRecord(myParcelFabricLayer, guid);
  if (!editOper.Execute())
    return editOper.ErrorMessage;
}
catch (Exception ex)
{
  return ex.Message;
}
return "";