Como adicionar margens a códigos QR

using IronQr;
using IronSoftware.Drawing;

QrStyleOptions styleOptions = new QrStyleOptions
{
    // Set all margins to 40px
    Margins = 40,

};

string url = "https://ironsoftware.com/csharp/qr/";

// Create QR code
QrCode qr = QrWriter.Write(url);

// Save QR code as a bitmap using the style options
AnyBitmap qrImage = qr.Save(styleOptions);

// Save QR code bitmap as file
qrImage.SaveAs("qr-uniform-margins.png");

using IronQr;
using IronSoftware.Drawing;

// Configure QR code styling with individual margins and background color
QrStyleOptions combinedOptions = new QrStyleOptions
{
    Dimensions = 400,
    MarginTop = 50,
    MarginBottom = 50,
    MarginLeft = 20,
    MarginRight = 20,
    BackgroundColor = IronSoftware.Drawing.Color.LightYellow,
};

string url = "https://ironsoftware.com/";

// Generate QR code from URL
QrCode qrCombined = QrWriter.Write(url);

// Apply styling options and export as bitmap
AnyBitmap qrCombinedImage = qrCombined.Save(combinedOptions);

// Save QR code to file
qrCombinedImage.SaveAs("qr-custom-margins.png");