How to create 2D Polygon with C#

Question

I am trying to create this 2D polygon but I get a blank a image after plotting the points.
The Point class takes x and y axes as parameters. Point(x, y)

`

Bitmap bitmap = new Bitmap(1000, 800, PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(System.Drawing.Color.Blue, 2);
Point[] points =
{
    new Point(2408,  919),
    new Point(2596, 919),
    new Point(2596, 1200),
    new Point(2408,  919),
    new Point(2596, 1505),
    new Point(2572, 1505),
    new Point(2408,  1200),
    new Point(2408,  919)
};
graphics.DrawPolygon(pen, points);
bitmap.Save("DrawPolygon.png");

Update: The polygon now displays as per Jimi's first comment. New issue is the polygon shortest length always sit on the horizontal axis and the polygon lines are crossing.