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);
}