在Visual C#2010中加载Circle？

using System;
using System.Drawing;
using System.Windows.Forms;

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

        private void Form1_Load(object sender, EventArgs e)
        {
            // 在窗体加载时绘制圆形
            DrawCircle();
        }

        private void DrawCircle()
        {
            // 创建一个Bitmap对象作为绘图表面
            Bitmap bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);

            // 创建一个Graphics对象
            Graphics g = Graphics.FromImage(bmp);

            // 设置绘图参数
            Pen pen = new Pen(Color.Red, 2);

            // 计算圆形的位置和大小
            int x = pictureBox1.Width / 2 - 50;
            int y = pictureBox1.Height / 2 - 50;
            int width = 100;
            int height = 100;

            // 绘制圆形
            g.DrawEllipse(pen, x, y, width, height);

            // 将绘制好的图像显示在PictureBox控件上
            pictureBox1.Image = bmp;
        }
    }
}