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public void DrawPolygonPoint(PaintEventArgs e)
{
//eckolinx/y: die ecke oben links(x/y)
    int eckolinx = 30;
    int eckoliny = 30;
    // Erstelle den Stift
    Pen blackPen = new Pen(Color.Black, 3);
             
    // definiere die Eckpunkte
    Point point1 = new Point(eckolinx,eckoliny);
    Point point2 = new Point(eckolinx + 10, eckoliny);
    Point point3 = new Point(eckolinx + 20, eckoliny - 10);
    Point point4 = new Point(eckolinx + 10, eckoliny - 20);
    Point point5 = new Point(eckolinx  ,eckoliny - 20);
    Point point6 = new Point(eckolinx - 10 , eckoliny - 10 );
    Point[] curvePoints =
             {
                 point1,
                 point2,
                 point3,
                 point4,
                 point5,
                 point6,
             }
    ;             
    // zeichne das Polygon
    e.Graphics.DrawPolygon(blackPen, curvePoints);
}
        private void button2_Click(object sender, EventArgs e)
        {
            DrawPolygonPoint();
        }
               
    }