Below is the sample how to draw a Polygon by using c#.
public void DrawPolygonPoint(PaintEventArgs e)
{
Pen blackPen = new Pen(Color.Black, 3);
Point point1 = new Point(50, 50);
Point point2 = new Point(100, 25);
Point point3 = new Point(200, 5);
Point point4 = new Point(250, 50);
Point point5 = new Point(300, 100);
Point point6 = new Point(350, 200);
Point point7 = new Point(250, 250);
Point[] curvePoints =
{
point1,
point2,
point3,
point4,
point5,
point6,
point7
};
e.Graphics.DrawPolygon(blackPen, curvePoints);
}
For more info :
Polygon
Another link :
SOF
I hope this will help to you.