如何在zxing.net中的二维码下方添加文本

// 引用zxing.net库
using ZXing;

// 生成二维码的函数
public Bitmap GenerateQRCode(string content, string text)
{
    // 创建二维码写入器
    BarcodeWriter writer = new BarcodeWriter
    {
        Format = BarcodeFormat.QR_CODE,
        Options = new ZXing.Common.EncodingOptions
        {
            Height = 300,
            Width = 300
        }
    };

    // 生成二维码图像
    Bitmap qrCodeBitmap = writer.Write(content);

    // 创建文本图像
    Bitmap textBitmap = new Bitmap(qrCodeBitmap.Width, 30);
    using (Graphics graphics = Graphics.FromImage(textBitmap))
    {
        using (Font font = new Font("Arial", 12))
        {
            graphics.DrawString(text, font, Brushes.Black, new PointF(0, 0));
        }
    }

    // 合并二维码图像和文本图像
    Bitmap mergedBitmap = new Bitmap(qrCodeBitmap.Width, qrCodeBitmap.Height + textBitmap.Height);
    using (Graphics graphics = Graphics.FromImage(mergedBitmap))
    {
        graphics.DrawImage(qrCodeBitmap, 0, 0);
        graphics.DrawImage(textBitmap, 0, qrCodeBitmap.Height);
    }

    return mergedBitmap;
}