如何在pictureBox下画画

怎么在pictureBox上画画

C# code

        private void Form1_Load(object sender, EventArgs e)        {            Graphics g = pictureBox1.CreateGraphics();            g.DrawLine(new Pen(Color.White, 10), 0, 0, 111, 111);        }

C# code

        private void Form1_Paint(object sender, PaintEventArgs e)        {            Graphics g = pictureBox1.CreateGraphics();            g.DrawLine(new Pen(Color.White, 10), 0, 0, 111, 111);        }

C# code

private void pictureBox1_Paint(object sender, PaintEventArgs e)        {            e.Graphics.DrawLine(new Pen(Color.White, 10), 0, 0, 111, 111);        }