public void SetMapFrame( 
   MapFrame mapFrame
)

//Added references
using ArcGIS.Desktop.Core;                         //Project
using ArcGIS.Desktop.Layouts;                      //Layout class
using ArcGIS.Desktop.Framework.Threading.Tasks;    //QueuedTask

public class MapSurroundExample
{
  public static Task<bool> UpdateMapSurroundAsync(string LayoutName, string SBName, string MFName)
  {
    //Reference a layoutitem in a project by name
    LayoutProjectItem layoutItem = Project.Current.GetItems<LayoutProjectItem>().FirstOrDefault(item => item.Name.Equals(LayoutName));
    if (layoutItem == null)
      return Task.FromResult(false);

    return QueuedTask.Run<bool>(() =>
    {
            //Reference and load the layout associated with the layout item
            Layout lyt = layoutItem.GetLayout();

            //Reference a scale bar element by name
            MapSurround scaleBar = lyt.FindElement(SBName) as MapSurround;
      if (scaleBar == null)
        return false;

            //Reference a map frame element by name
            MapFrame mf = lyt.FindElement(MFName) as MapFrame;
      if (mf == null)
        return false;

            //Set the scale bar to the newly referenced map frame
            scaleBar.SetMapFrame(mf);
      return true;
    });
  }
}

//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;
});

await QueuedTask.Run(() =>
{
  LayoutProjectItem layoutItem = Project.Current.GetItems<LayoutProjectItem>()
              .FirstOrDefault(item => item.Name.Equals("Layout Name"));
  Layout lyt = layoutItem.GetLayout();
  MapFrame mf = lyt.FindElement("Map1 Map Frame") as MapFrame;
  MapSurround ms = lyt.FindElement("Scale Bar") as MapSurround;

  ms.SetMapFrame(mf);
});

//Update a map surround.

//Perform on the worker thread
QueuedTask.Run(() =>
{
  // Reference and load the layout associated with the layout item
  Layout layout = layoutItem.GetLayout();
  if (layout != null)
  {
    // Reference a scale bar element by name
    MapSurround scaleBar = layout.FindElement("MyScaleBar") as MapSurround;

    // Reference a map frame element by name
    MapFrame mf = layout.FindElement("MyMapFrame") as MapFrame;

    if ((scaleBar != null) && (mf != null))
      //Set the scale bar to the newly referenced map frame
      scaleBar.SetMapFrame(mf);
  }
});