Install-Package ZXing.Net

using System.Drawing;
using ZXing;
 
public class QRCodeGenerator
{
    public static Bitmap GenerateQRCode(string text)
    {
        var writer = new BarcodeWriter
        {
            Format = BarcodeFormat.QR_CODE,
            Options = new QrCodeEncodingOptions
            {
                Height = 200,
                Width = 200
            }
        };
        return writer.Write(text);
    }
}
 
// 使用方法
var qrCode = QRCodeGenerator.GenerateQRCode("Hello, World!");
qrCode.Save("qrcode.png");

完整的小项目下载地址：简单的二维码小程序下载资源-CSDN文库