How do I draw a circle and line in the picturebox?

Question

How do I draw a circle and line in the picturebox?

Answer 1

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 Asssignment
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)
        { 
            Graphics g = this.CreateGraphics();
            Pen p = new Pen(Color.Blue);
            int radius = 200;
            int x =Width/2;
            int y =Height/2;


            int first_point1 = (int)(Math.Cos(0) * radius + x);
            int first_point2 = (int)(Math.Sin(0) * radius + y);

            Point p1= new Point(first_point1,first_point2);
            for(int i=1;i<500; i++)
            {
                int dx = (int)(Math.Cos(i)*radius+x );
                int dy = (int)(Math.Sin(i)*radius+y );
                Point p2 = new Point(dx, dy);
                g.DrawLine(p, p1, p2);
                p1 = p2;
            }
        }
    }
}