I have a List<Point> where Point contains X and Y.

What i want is to loop a list like that and draw a line point to point, i do so by:

foreach (List<Point> wps in map.waypoints)
{
  System.Drawing.Pen myPen;
  myPen = new System.Drawing.Pen(System.Drawing.Color.Black);
  System.Drawing.Graphics formGraphics = this.pictureBox1.CreateGraphics();

  Point startPos = new Point(wps[0].X, wps[0].Y);

  foreach (Point p in wps)
  {
    formGraphics.DrawLine(myPen, startPos.X, startPos.Y, p.X, p.Y);
    startPos = p;
  }

  myPen.Dispose();
  formGraphics.Dispose();
}

BUT nothing gets drawn! I did the same with the on_click event to the pictureBox but instead if a looping some Points ive just used mouse X and Y. I have verified the lists of points that they dont contain rubish :D