public virtual void LayersRadioGroup()
{
String outPdf = destinationFolder + "layersRadioGroup.pdf";
String cmpPdf = sourceFolder + "cmp_layersRadioGroup.pdf";
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(outPdf));
PdfFont font = PdfFontFactory.CreateFont();
PdfLayer radiogroup = PdfLayer.CreateTitle("Radio group", pdfDoc);
PdfLayer radio1 = new PdfLayer("Radiogroup: layer 1", pdfDoc);
radio1.SetOn(true);
PdfLayer radio2 = new PdfLayer("Radiogroup: layer 2", pdfDoc);
radio2.SetOn(false);
PdfLayer radio3 = new PdfLayer("Radiogroup: layer 3", pdfDoc);
radio3.SetOn(false);
radiogroup.AddChild(radio1);
radiogroup.AddChild(radio2);
radiogroup.AddChild(radio3);
IList <PdfLayer> options = new List <PdfLayer>();
options.Add(radio1);
options.Add(radio2);
options.Add(radio3);
PdfLayer.AddOCGRadioGroup(pdfDoc, options);
PdfCanvas canvas = new PdfCanvas(pdfDoc.AddNewPage());
canvas.SetFontAndSize(font, 12);
PdfLayerTestUtils.AddTextInsideLayer(radio1, canvas, "layer option 1", 50, 600);
PdfLayerTestUtils.AddTextInsideLayer(radio2, canvas, "layer option 2", 50, 575);
PdfLayerTestUtils.AddTextInsideLayer(radio3, canvas, "layer option 3", 50, 550);
pdfDoc.Close();
PdfLayerTestUtils.CompareLayers(outPdf, cmpPdf);
}