Отрисовка примитивов PictureBox

public partial class Form1 : Form
    {
        Graphics graph;
 
        public Form1()
        {
            InitializeComponent();
            graph = RenderPlane.CreateGraphics();
        }
 
        void drawPrimitive()
        {
            graph.DrawLine(new Pen(Brushes.Black, 4), new Point(10, 10), new Point(100, 100));
        }
 
        private void RenderPlane_Paint(object sender, PaintEventArgs e)
        {
            drawPrimitive();
        }
    }

Graphics g = Graphics.FromHwnd(pictureBox1.Handle);
 g.DrawLine(new Pen(Brushes.Black, 4), new Point(10, 10), new Point(100, 100));

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
 
namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
Graphics g = Graphics.FromHwnd(pictureBox1.Handle);
            g.DrawLine(new Pen(Brushes.Black, 4), new Point(10, 10), new Point(100, 100));
 
        }
    }
}

        private void RenderPlane_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.DrawLine(new Pen(Brushes.Black, 4), new Point(10, 10), new Point(100, 100));
        }

        void drawPrimitive(Graphics e)
        {
            e.DrawLine(new Pen(Brushes.Black, 4), new Point(10, 10), new Point(100, 100));
        }
 
        private void RenderPlane_Paint(object sender, PaintEventArgs e)
        {
            drawPrimitive(e.Graphics);
        }