public ReadOnlyObservableCollection<Element> Elements {get;}

//check the parent
var parent = groupElement.Elements.First().GetParent();//will be the group element
//top-most parent
var top_most = groupElement.Elements.First().GetParent(true);//will be the GraphicsLayer

//Convert a legend to a graphic and move the Title to the bottom of the legend and also move
//the label in the contents pane to the bottom of the list.

//Perform on the worker thread
await QueuedTask.Run(() =>
{
  Legend leg = layout.FindElement("Legend") as Legend;
  GroupElement result = leg.ConvertToGraphics().First() as GroupElement;
  Element firstElm = result.Elements.First();  //Note: Bottom element is first in drawing order.
  foreach (Element elm in result.Elements)
  {
    if (elm.Name == "Title")
    {
      elm.SetY(firstElm.GetY() - 0.25);  //Move title below other legend elements
      elm.SetTOCPositionAbsolute(result, false);  // Move Title item in TOC to bottom as well
    }
  }
});

//check the parent
var parent = groupElement.Elements.First().GetParent();//will be the group element
//top-most parent
//will be a GraphicsLayer or Layout
var top_most = groupElement.Elements.First().GetParent(true);

//ReportDetailsSection contains the "Fields"

var elements = reportDetailsSection.Elements;
reportDetailsSection.SelectElements(elements);

//This is the gap between two fields
double fieldIncrement = 0.9388875113593206276389;
//On the QueuedTask
//New field to add.
var newReportField = new CIMReportField
{
  Name = "POP1990",
  FieldOrder = 2,
};
//Get the "ReportSection element"                
var mainReportSection = report.Elements.OfType<ReportSection>().FirstOrDefault();
if (mainReportSection == null) return;

//Get the "ReportDetails" within the ReportSectionElement. ReportDetails is where "fields" are.
var reportDetailsSection = mainReportSection?.Elements.OfType<ReportDetails>().FirstOrDefault();
if (reportDetailsSection == null) return;

//Within ReportDetails find the envelope that encloses a field.
//We get the first CIMParagraphTextGraphic in the collection so that we can add the new field next to it.                    
var lastFieldGraphic = reportDetailsSection.Elements.FirstOrDefault((r) =>
{
  var gr = r as GraphicElement;
  if (gr == null) return false;
  return (gr.GetGraphic() is CIMParagraphTextGraphic ? true : false);
});
//Get the Envelope of the last field
var graphicBounds = lastFieldGraphic.GetBounds();

//Min and Max values of the envelope
var xMinOfFieldEnvelope = graphicBounds.XMin;
var yMinOfFieldEnvelope = graphicBounds.YMin;

var xMaxOfFieldEnvelope = graphicBounds.XMax;
var YMaxOfFieldEnvelope = graphicBounds.YMax;
//create the new Envelope to be offset from the existing field
//At 2.x
//MapPoint newMinPoint = MapPointBuilder.CreateMapPoint(xMinOfFieldEnvelope + fieldIncrement, yMinOfFieldEnvelope);
//MapPoint newMaxPoint = MapPointBuilder.CreateMapPoint(xMaxOfFieldEnvelope + fieldIncrement, YMaxOfFieldEnvelope);
//Envelope newFieldEnvelope = EnvelopeBuilder.CreateEnvelope(newMinPoint, newMaxPoint);

MapPoint newMinPoint = MapPointBuilderEx.CreateMapPoint(xMinOfFieldEnvelope + fieldIncrement, yMinOfFieldEnvelope);
MapPoint newMaxPoint = MapPointBuilderEx.CreateMapPoint(xMaxOfFieldEnvelope + fieldIncrement, YMaxOfFieldEnvelope);
Envelope newFieldEnvelope = EnvelopeBuilderEx.CreateEnvelope(newMinPoint, newMaxPoint);

//Create field
GraphicElement fieldGraphic = ReportElementFactory.Instance.CreateFieldValueTextElement(reportDetailsSection, newFieldEnvelope, newReportField);