public class GraphicFactory : IGraphicFactory  

{
  //Note: on the QueuedTask
  //Place symbol on the layout
  MapPoint location = MapPointBuilderEx.CreateMapPoint(new Coordinate2D(9, 1));

  //specify a symbol
  var pt_symbol = SymbolFactory.Instance.ConstructPointSymbol(
                        ColorFactory.Instance.GreenRGB);

  //create a CIMGraphic 
  var graphic = new CIMPointGraphic()
  {
    Symbol = pt_symbol.MakeSymbolReference(),
    Location = location //center of map
  };
  //Or use GraphicFactory
  var graphicFactory = GraphicFactory.Instance.CreateSimpleGraphic(location, pt_symbol);

  ElementFactory.Instance.CreateGraphicElement(layout, graphic);
  ElementFactory.Instance.CreateGraphicElement(layout, graphicFactory);
}

{
  //Note: Must be on QueuedTask.Run

  //List of Point graphics
  var listGraphics = new List<CIMPointGraphic>();
  var listGraphicsFactory = new List<CIMPointGraphic>();
  //Symbol
  var pointSymbol = SymbolFactory.Instance.ConstructPointSymbol(
                                      ColorFactory.Instance.BlackRGB);
  //Define size of the array
  int dx = 5;
  int dy = 5;
  MapPoint point = null;
  //Create the List of graphics for the array
  for (int row = 0; row <= dx; ++row)
  {
    for (int col = 0; col <= dy; ++col)
    {
      point = MapPointBuilderEx.CreateMapPoint(col, row);
      //create a CIMGraphic 
      var graphic = new CIMPointGraphic()
      {
        Symbol = pointSymbol.MakeSymbolReference(),
        Location = point
      };
      listGraphics.Add(graphic);
      //Or use GraphicFactory
      var graphicFactory = GraphicFactory.Instance.CreateSimpleGraphic(
                                    point, pointSymbol) as CIMPointGraphic;
      listGraphicsFactory.Add(graphicFactory);
    }
  }
  //Draw the array of graphics

  var bulkgraphics = ElementFactory.Instance.CreateGraphicElements(
                                                     layout, listGraphics);
  var bulkgraphicsFactory = ElementFactory.Instance.CreateGraphicElements(
                                                     layout, listGraphicsFactory);
}