public MemoryStream GenerateImage( 
   CIMPointSymbol pointSymbol,
   OutputImageFormat imageFormat,
   double scaleFactor,
   bool centerAnchorPoint,
   double dpi,
   long width,
   long height,
   CIMColor backgroundColor
)

{
    //Note: Needs QueuedTask to run
    //Create a point symbol
    var pointSymbol = SymbolFactory.Instance.ConstructPointSymbol(
      ColorFactory.Instance.RedRGB, 24, SimpleMarkerStyle.RoundedSquare);

    //Generate image returns a stream
    //OutputImageFormat specified the format for the image - in this case
    //we want SVG (an xml-based format)
    //
    //output fmt: SVG, scale factor x2, centerAnchorPoint = true
    //dpi = 300, wd x ht: 100x100px, background: white
    var mem_strm = SymbolFactory.Instance.GenerateImage(
      pointSymbol, OutputImageFormat.SVG, 2.0, true, 300, 100, 100,
      ColorFactory.Instance.WhiteRGB);

    //Set the memory stream position to the beginning
    mem_strm.Seek(0, SeekOrigin.Begin);

    //File path and name for saving the SVG file
    var fileName = "RoundedSquareSymbol.svg";
    string path_svg = System.IO.Path.Combine(System.IO.Path.GetTempPath() + fileName);

    //Write the memory stream to the file
    System.IO.File.WriteAllBytes(path_svg, mem_strm.ToArray());

    //////////////////////////////////////////////
    //Note: to convert SVG to image format, use a 3rd party
    //e.g. Aspose.SVG for .NET, for example convert SVG to PNG
    //using (var svg_doc = new Aspose.Svg.SVGDocument(path_svg))
    //{
    //  string path_png = Path.Combine(Path.GetTempPath() + "RoundedSquareSymbol.png");
    //  using (var img_png = new Aspose.Svg.Rendering.Image.ImageDevice(
    //    new ImageRenderingOptions(ImageFormat.Png), path_png))
    //  {
    //    svg_doc.RenderTo(img_png);
    //  }
    //  //also: https://docs.aspose.com/imaging/net/convert-svg-to-png/
    //}
}

{
    //Note: Needs QueuedTask to run
    //Create a point symbol
    var pointSymbol = SymbolFactory.Instance.ConstructPointSymbol(
      ColorFactory.Instance.RedRGB, 24, SimpleMarkerStyle.RoundedSquare);

    //Generate image returns a stream
    //OutputImageFormat specified the format for the image - in this case
    //we want PNG
    //
    //output fmt: PNG, scale factor x2, centerAnchorPoint = true
    //dpi = 300, wd x ht: 100x100px, background: white
    var mem_strm = SymbolFactory.Instance.GenerateImage(
      pointSymbol, OutputImageFormat.PNG, 2.0, true, 300, 100, 100,
      ColorFactory.Instance.WhiteRGB);

    //Set the memory stream position to the beginning
    mem_strm.Seek(0, SeekOrigin.Begin);

    //Write the stream to a bit map
    var bitmapImage = new System.Windows.Media.Imaging.BitmapImage();

    bitmapImage.BeginInit();
    bitmapImage.StreamSource = mem_strm;
    bitmapImage.CacheOption = System.Windows.Media.Imaging.BitmapCacheOption.OnLoad;
    bitmapImage.EndInit();
    bitmapImage.Freeze();

    //Write the bit map out to a file
    //File path and name for saving the PNG file
    var fileName = "RoundedSquareSymbol.png";
    string path_png = System.IO.Path.Combine(System.IO.Path.GetTempPath() + fileName);

    BitmapEncoder encoder = new PngBitmapEncoder();
    encoder.Frames.Add(BitmapFrame.Create(bitmapImage));

    using (var fileStream = new System.IO.FileStream(
      path_png, System.IO.FileMode.Create))
    {
        encoder.Save(fileStream);
    }
}