How to add quite zones to barcode in PDF using C# and VB.NET in WinForms?

using Syncfusion.Pdf;
using Syncfusion.Pdf.Barcode;
using Syncfusion.Pdf.Graphics;
using System.Drawing;

Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Barcode
Imports Syncfusion.Pdf.Graphics
Imports System.Drawing

//Create a new PDF document.
PdfDocument document = new PdfDocument();
 
//Creates a new page. 
PdfPage page = document.Pages.Add();
 
//Creates a new PdfCode93Barcode.
PdfCode93Barcode code93 = new PdfCode93Barcode("CODE93");
 
//Creates a new PdfBarcodeQuietZones.
PdfBarcodeQuietZones quietZones = new PdfBarcodeQuietZones();
quietZones.All = 50f;
 
//Sets the barcode quiet zone.
code93.QuietZone = quietZones;
 
//Draws a barcode on the new page.
code93.Draw(page, new PointF(10, 10));
 
//Draw a rectangle based on the barcode size. 
page.Graphics.DrawRectangle(PdfPens.Red, new RectangleF(10, 10, code93.Size.Width, code93.Size.Height));
 
//Save the document to disk.
document.Save("PdfBarcode.pdf");
 
//This will open the PDF file and the result will be seen in the default PDF Viewer. 
Process.Start("PdfBarcode.pdf");

'Create a new PDF document. 
Dim document As PdfDocument = New PdfDocument()
 
'Creates a new page. 
Dim page As PdfPage = document.Pages.Add()
 
'Creates a new PdfCode93Barcode.
Dim code93 As PdfCode93Barcode = New PdfCode93Barcode("CODE93")
 
'Creates a new PdfBarcodeQuietZones. 
Dim quietZones As PdfBarcodeQuietZones = New PdfBarcodeQuietZones()
quietZones.All = 50.0F
 
'Sets the barcode quiet zone to all sides. 
code93.QuietZone = quietZones
 
'Draws a barcode on the new page.
code93.Draw(page, New PointF(10, 10))
 
'Draw a rectangle based on the barcode size.  
page.Graphics.DrawRectangle(PdfPens.Red, New RectangleF(10, 10, code93.Size.Width, code93.Size.Height))
 
'Save the document to disk.
document.Save("PdfBarcode.pdf")
 
'This will open the PDF file and the result will be seen in the default PDF Viewer. 
Process.Start("PdfBarcode.pdf")