引用nuget包

QRCoder-ImageSharp

        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name="text">内容</param>
        /// <param name="width">宽度</param>
        /// <param name="height">高度</param>
        /// <returns>Bitmap对象</returns>
        public Image GenerateQRCode(string text, int width, int height)
        {
            using QRCodeGenerator qrGenerator = new QRCodeGenerator();
            using QRCodeData qrCodeData = qrGenerator.CreateQrCode(text, QRCodeGenerator.ECCLevel.Q);
            using QRCoder.BitmapByteQRCode bitmapByteQRCode = new BitmapByteQRCode(qrCodeData);
          

            var datas = bitmapByteQRCode.GetGraphic(5, "#000000", "#ffffff");
            Image image = Image.Load(datas);
            image.Mutate(ctx =>
            {
                ctx.Resize(width, height);
            });
            return image;
        }

        /// <summary>
        /// 生成带Logo的二维码
        /// </summary>
        /// <param name="text">内容</param>
        /// <param name="width">宽度</param>
        /// <param name="height">高度</param>
        /// <param name="logoImage">Logo</param>
        /// <returns>Bitmap对象</returns>
        public Image GenerateQRCodeWithLogo(string text, int width, int height, Image logoImage)
        {
            var qrCodeImage = GenerateQRCode(text, width, height);
            // 计算插入 logo 的位置


            int x = (width - logoImage.Width) / 2;
            int y = (height - logoImage.Width) / 2;

            qrCodeImage.Mutate(ctx => {
                ctx.DrawImage(logoImage, new Point(x, y), 1);
            });

            return qrCodeImage;
        }