private void button16_Click(object sender, System.EventArgs e) { C1.C1Pdf.C1PdfDocument pdf = new C1.C1Pdf.C1PdfDocument(); // create an array with some points PointF[] points = new PointF[] { new PointF(100, 100), new PointF(300, 100), new PointF(200, 200) }; // fill and draw a polygon pdf.FillPolygon(Brushes.Beige, points); pdf.DrawPolygon(Pens.Black, points); // save the document to a file string fileName = tempdir + "poly.pdf"; pdf.Save(fileName); System.Diagnostics.Process.Start(fileName); }