C# GDI如何绘制适合矩形的文本？

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

public class Form1 : Form
{
    public Form1()
    {
        // 设置窗体大小和标题
        this.Size = new Size(400, 300);
        this.Text = "绘制适合矩形的文本示例";
    }

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

        Graphics g = e.Graphics;
        string text = "这是一段需要绘制的文本";
        Font font = new Font("Arial", 12);

        // 定义矩形的位置和大小
        Rectangle rect = new Rectangle(50, 50, 300, 200);

        // 测量文本的大小
        SizeF textSize = g.MeasureString(text, font);

        // 调整文本的位置使其适合矩形
        float x = rect.Left + (rect.Width - textSize.Width) / 2;
        float y = rect.Top + (rect.Height - textSize.Height) / 2;

        // 绘制文本
        g.DrawString(text, font, Brushes.Black, x, y);
    }

    public static void Main()
    {
        Application.Run(new Form1());
    }
}