How to Draw Shape in WinForms c#

	    
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Draw_Shape_Ellipse_Circle_Star
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }

    private void DrawEllipse(PaintEventArgs e)
    {
      System.Drawing.Drawing2D.GraphicsPath gp = new System.Drawing.Drawing2D.GraphicsPath();
      gp.AddEllipse(100, 15, 100, 70);
      System.Drawing.Region r = new System.Drawing.Region(gp);
      Graphics gr = e.Graphics;
      gr.FillRegion(Brushes.LawnGreen, r);
    }
    private void DrawStar(PaintEventArgs e)
    {
      System.Drawing.Point[] p = new System.Drawing.Point[8];
      p[0] = new Point(0, 50);
      p[1] = new Point(40, 40);
      p[2] = new Point(50, 0);
      p[3] = new Point(60, 40);
      p[4] = new Point(100, 50);
      p[5] = new Point(60, 60);
      p[6] = new Point(50, 100);
      p[7] = new Point(40, 60);
      System.Drawing.Drawing2D.GraphicsPath gp = new System.Drawing.Drawing2D.GraphicsPath();
      gp.AddPolygon(p);
     
      System.Drawing.Region r = new System.Drawing.Region(gp);
      Graphics gr = e.Graphics;
      gr.FillRegion(Brushes.BlueViolet, r);
    }

    private void DrawRectangle(PaintEventArgs e)
    {
      System.Drawing.Drawing2D.GraphicsPath gp = new System.Drawing.Drawing2D.GraphicsPath();
      Rectangle rc = new Rectangle(220, 15, 100, 70);
      gp.AddRectangle(rc);
      System.Drawing.Region r = new System.Drawing.Region(gp);     
      Graphics gr = e.Graphics;     
      gr.FillRegion(Brushes.OrangeRed, r);
    }

    private void Form1_Paint(object sender, PaintEventArgs e)
    {
      DrawStar(e);
      DrawEllipse(e);
      DrawRectangle(e);
    }
  }
}