public CIMTextSymbol ConstructTextSymbol( 
   CIMColor color,
   double size
)

{
  //Create a simple point text element and assign basic symbology and text settings.

  //Note: Must be on QueuedTask.Run
  //Build 2D point geometry
  Coordinate2D coord2D = new Coordinate2D(3.5, 10);

  //Set symbology, create and add element to layout
  CIMTextSymbol sym = SymbolFactory.Instance.ConstructTextSymbol(
                ColorFactory.Instance.RedRGB, 32, "Arial", "Regular");
  string textString = "Point text";

  //use ElementInfo to set placement properties during create
  var elemInfo = new ElementInfo()
  {
    Anchor = Anchor.CenterPoint,
    Rotation = 45
  };
  var ptTxtElm = ElementFactory.Instance.CreateTextGraphicElement(
    layout, TextType.PointText, coord2D.ToMapPoint(), sym, textString,
                       "New Point Text", true, elemInfo);

  //Change additional text properties
  ptTxtElm.SetX(4.5);
  ptTxtElm.SetY(9.5);
}

{
  //Note: Must be on QueuedTask.Run
  //Create rectangle text with background and border symbology.  
  //Build 2D polygon geometry
  List<Coordinate2D> plyCoords = new List<Coordinate2D>();
  plyCoords.Add(new Coordinate2D(3.5, 7));
  plyCoords.Add(new Coordinate2D(4.5, 7));
  plyCoords.Add(new Coordinate2D(4.5, 6.7));
  plyCoords.Add(new Coordinate2D(5.5, 6.7));
  plyCoords.Add(new Coordinate2D(5.5, 6.1));
  plyCoords.Add(new Coordinate2D(3.5, 6.1));
  Polygon poly = PolygonBuilderEx.CreatePolygon(plyCoords);

  //Set symbology, create and add element to layout
  //Also notice how formatting tags are using within the text string.
  CIMTextSymbol sym = SymbolFactory.Instance.ConstructTextSymbol(
                    ColorFactory.Instance.GreyRGB, 10, "Arial", "Regular");
  string text = "Some Text String that is really long and is " +
                "<BOL>forced to wrap to other lines</BOL> so that " +
                "we can see the effects." as String;

  GraphicElement polyTxtElm = ElementFactory.Instance.CreateTextGraphicElement(
    layout, TextType.RectangleParagraph, poly, sym, text, "Polygon Paragraph");

  //(Optionally) Modify paragraph border 
  CIMGraphic polyTxtGra = polyTxtElm.GetGraphic();
  CIMParagraphTextGraphic cimPolyTxtGra = polyTxtGra as CIMParagraphTextGraphic;
  cimPolyTxtGra.Frame.BorderSymbol = new CIMSymbolReference();
  cimPolyTxtGra.Frame.BorderSymbol.Symbol =
               SymbolFactory.Instance.ConstructLineSymbol(
                          ColorFactory.Instance.GreyRGB, 1.0, SimpleLineStyle.Solid);
  polyTxtElm.SetGraphic(polyTxtGra);
}

{
    //Note: Needs QueuedTask to run
    //using the default font
    var textSym1 = SymbolFactory.Instance.ConstructTextSymbol();
    var textSym2 = SymbolFactory.Instance.ConstructTextSymbol(
                       ColorFactory.Instance.BlueRGB, 14);

    //using a specific font
    var textSym3 = SymbolFactory.Instance.ConstructTextSymbol("Arial");
    var textSym4 = SymbolFactory.Instance.ConstructTextSymbol(
                      "Arial", "Narrow Bold");

    //or query available fonts to ensure the font is there
    var all_fonts = SymbolFactory.Instance.GetAvailableFonts();
    var font = all_fonts.FirstOrDefault(f => f.fontName == "Arial");
    if (!string.IsNullOrEmpty(font.fontName))
    {
        var textSym5 = SymbolFactory.Instance.ConstructTextSymbol(font.fontName);
        //or with a font+style
        var textSym6 = SymbolFactory.Instance.ConstructTextSymbol(
                                        font.fontName, font.fontStyles.First());
    }

    //overloads - font + color and size, etc
    var textSym7 = SymbolFactory.Instance.ConstructTextSymbol(
                    ColorFactory.Instance.BlueRGB, 14, "Times New Roman", "Italic");

    //custom symbol - black stroke, red fill
    var poly_symbol = SymbolFactory.Instance.ConstructPolygonSymbol(
      SymbolFactory.Instance.ConstructSolidFill(ColorFactory.Instance.RedRGB),
      SymbolFactory.Instance.ConstructStroke(ColorFactory.Instance.BlackRGB, 1));
    var textSym8 = SymbolFactory.Instance.ConstructTextSymbol(
            poly_symbol, 14, "Georgia", "Bold");
}