MapSurround CreateMapSurroundElement( 
   IElementContainer elementContainer,
   Geometry frameOrLocation,
   MapSurroundInfo surroundInfo,
   string elementName,
   bool select,
   ElementInfo elementInfo
)

//Create a scale bar for a specific map frame and assign a scale bar style item.

//Construct on the worker thread
await QueuedTask.Run(() =>
{
  //Reference a North Arrow in a style
  StyleProjectItem stylePrjItm = Project.Current.GetItems<StyleProjectItem>().FirstOrDefault(item => item.Name == "ArcGIS 2D");
  ScaleBarStyleItem sbStyleItm = stylePrjItm.SearchScaleBars("Double Alternating Scale Bar 1")[0];

  //Build geometry
  Coordinate2D center = new Coordinate2D(7, 8);

  //Reference MF, create north arrow and add to layout 
  MapFrame mf = layout.FindElement("New Map Frame") as MapFrame;
  if (mf == null)
  {
    ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show("Map frame not found", "WARNING");
    return;
  }

  //At 2.x -
  //ScaleBar sbElm = LayoutElementFactory.Instance.CreateScaleBar(layout, center, mf, sbStyleItm);
  //sbElm.SetName("New Scale Bar");
  //sbElm.SetWidth(2);
  //sbElm.SetX(6);
  //sbElm.SetY(7.5); 

  var sbInfo = new ScaleBarInfo()
  {
    MapFrameName = mf.Name,
    ScaleBarStyleItem = sbStyleItm
  };
  var sbElm = ElementFactory.Instance.CreateMapSurroundElement(
                                      layout, center.ToMapPoint(), sbInfo, "New Scale Bar") as ScaleBar;
  sbElm.SetWidth(2);
  sbElm.SetX(6);
  sbElm.SetY(7.5);
});

//Create a north arrow for a specific map frame and assign a north arrow style item.

//Construct on the worker thread
await QueuedTask.Run(() =>
{
  //Reference a North Arrow in a style
  StyleProjectItem stylePrjItm = Project.Current.GetItems<StyleProjectItem>().FirstOrDefault(item => item.Name == "ArcGIS 2D");
  NorthArrowStyleItem naStyleItm = stylePrjItm.SearchNorthArrows("ArcGIS North 10")[0];

  //Build geometry
  Coordinate2D center = new Coordinate2D(7, 5.5);

  //Reference MF, create north arrow and add to layout 
  MapFrame mf = layout.FindElement("New Map Frame") as MapFrame;
  if (mf == null)
  {
    ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show("Map frame not found", "WARNING");
    return;
  }
  //At 2.x -
  //NorthArrow arrowElm = LayoutElementFactory.Instance.CreateNorthArrow(layout, center, mf, naStyleItm);
  //arrowElm.SetName("New North Arrow");
  //arrowElm.SetHeight(1.75);
  //arrowElm.SetX(7);
  //arrowElm.SetY(6);

  var naInfo = new NorthArrowInfo()
  {
    MapFrameName = mf.Name,
    NorthArrowStyleItem = naStyleItm
  };

  var arrowElm = ElementFactory.Instance.CreateMapSurroundElement(
                            layout, center.ToMapPoint(), naInfo, "New North Arrow") as NorthArrow;
  arrowElm.SetHeight(1.75);
  arrowElm.SetX(7);
  arrowElm.SetY(6);
});

//Create a new table frame on the active layout.

Layout layout = LayoutView.Active.Layout;

//Perform on the worker thread
await QueuedTask.Run(() =>
{
  //Build 2D envelope geometry
  Coordinate2D rec_ll = new Coordinate2D(1.0, 3.5);
  Coordinate2D rec_ur = new Coordinate2D(7.5, 4.5);
  //At 2.x - Envelope rec_env = EnvelopeBuilder.CreateEnvelope(rec_ll, rec_ur);
  Envelope rec_env = EnvelopeBuilderEx.CreateEnvelope(rec_ll, rec_ur);

  //Reference map frame
  MapFrame mf = layout.FindElement("Map Frame") as MapFrame;

  //Reference layer
  Map m = mf.Map;
  FeatureLayer lyr = m.FindLayers("GreatLakes").First() as FeatureLayer;

  //Build fields list
  var fields = new[] { "NAME", "Shape_Area", "Shape_Length" };

  //Construct the table frame
  //At 2.x - TableFrame tabFrame = LayoutElementFactory.Instance.CreateTableFrame(layout, rec_env, mf, lyr, fields);
  var surroundInfo = new TableFrameInfo()
  {
    FieldNames = fields,
    MapFrameName = mf.Name,
    MapMemberUri = lyr.URI
  };
  var tabFrame = ElementFactory.Instance.CreateMapSurroundElement(layout, rec_env, surroundInfo) as TableFrame;
});