Rectangles and polygons for drawing basic graphics

To draw a rectangle, a Graphics object and a pen object are required

Graphics objects provide the DrawRectangle method, while pen objects store line characteristics such as color and width

 

The format is:

　　Variable name.DraRectangle(parameter 1, parameter 2, parameter 3, parameter 4, parameter 5)

 

Parameter 1: pen object Parameter 2: X coordinate of the upper left corner of the rectangle

Parameter 3: Y coordinate of the upper left corner of the rectangle Parameter 2: X coordinate of the lower right corner of the rectangle

Parameter 5: Y coordinate of the lower right corner of the rectangle

private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            Pen p = new Pen(Color.Red,2);
            // draw rectangle
            g.DrawRectangle(p,10,20,260,260);
        }