如何统一绘制平滑的线条(基于c#的编码问题)

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

public class SmoothLineForm : Form
{
    public SmoothLineForm()
    {
        // 设置窗体大小和标题
        this.ClientSize = new Size(500, 500);
        this.Text = "绘制平滑的线条示例";
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);

        // 创建Graphics对象
        Graphics g = e.Graphics;

        // 创建Pen对象，并设置线条颜色和宽度
        Pen pen = new Pen(Color.Black, 2);

        // 设置线条平滑模式
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

        // 绘制线条
        g.DrawLine(pen, 50, 50, 200, 200);

        // 释放资源
        pen.Dispose();
        g.Dispose();
    }

    public static void Main()
    {
        Application.Run(new SmoothLineForm());
    }
}