public CIMGraphic Graphic {get; set;}

//on the QueuedTask
//Place symbol on the layout
//At 2.x - MapPoint location = MapPointBuilder.CreateMapPoint(
//                                               new Coordinate2D(9, 1));
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 graphic2 = GraphicFactory.Instance.CreateSimpleGraphic(location, pt_symbol);

//At 2.x - LayoutElementFactory.Instance.CreateGraphicElement(layout, graphic);
ElementFactory.Instance.CreateGraphicElement(container, graphic);
ElementFactory.Instance.CreateGraphicElement(container, graphic2);

//Must be on QueuedTask.Run(() => { ...

//Place symbol on the layout
//At 2.x - MapPoint point = MapPointBuilder.CreateMapPoint(new Coordinate2D(9, 1));
MapPoint point = MapPointBuilderEx.CreateMapPoint(new Coordinate2D(9, 1));

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

//create a CIMGraphic 
var graphic = new CIMGraphicElement()
{
  Graphic = new CIMPointGraphic()
  {
    Symbol = pt_symbol.MakeSymbolReference(),
    Location = point //A point in the layout
  }
};
//At 2.x - LayoutElementFactory.Instance.CreateElement(layout, graphic);
ElementFactory.Instance.CreateElement(container, graphic);