public string MapMemberUri {get; set;}

{
  //Create a table frame.
  //Note: Must be on QueuedTask.Run

  //Build 2D envelope geometry
  Coordinate2D rec_ll = new Coordinate2D(1.0, 3.5);
  Coordinate2D rec_ur = new Coordinate2D(7.5, 4.5);
  Envelope rec_env = EnvelopeBuilderEx.CreateEnvelope(rec_ll, rec_ur);

  //Reference map frame and layer
  MapFrame mf = layout.FindElement("Map Frame") as MapFrame;
  FeatureLayer lyr = mf.Map.FindLayers("GreatLakes").First() as FeatureLayer;

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

  //Construct the table frame

  var tableFrameInfo = new TableFrameInfo()
  {
    FieldNames = fields,
    MapFrameName = mf.Name,
    MapMemberUri = lyr.URI
  };
  var tabFrame = ElementFactory.Instance.CreateMapSurroundElement(
    layout, rec_env, tableFrameInfo) as TableFrame;
}

{
  //Note: Must be on QueuedTask.Run

  //Build geometry
  Coordinate2D ll = new Coordinate2D(1, 1);
  Coordinate2D ur = new Coordinate2D(4, 4);
  Envelope env = EnvelopeBuilderEx.CreateEnvelope(ll, ur);

  var tableFrameInfo = new TableFrameInfo()
  {
    MapFrameName = "Map Frame",
    MapMemberUri = "CIMPATH=USNationalParks/NationalParks.json"
  };
  var attribs = new List<CIMStringMap>();
  for (int i = 1; i < 6; i++)
  {
    attribs.Add(new CIMStringMap
    {
      Key = $"Key {i}",
      Value = $"Value {i}"
    });
  }
  var elemInfo = new ElementInfo()
  {
    CustomProperties = attribs
  };
  var tableFrameElem = ElementFactory.Instance.CreateMapSurroundElement(
                                layout, env.Center, tableFrameInfo,
                                "New Table Frame", false, elemInfo) as TableFrame;
}