How to resize WinForms Pdf Page from an existing using C# and VB.NET?

using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;

Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Graphics
Imports Syncfusion.Pdf.Parsing

string inputFilePath = @"../../Data/sample.pdf";
 
string outputFilePath = @"../../Data/output.pdf";
 
byte[] data = System.IO.File.ReadAllBytes(inputFilePath);
 
//Load a PDF document.
 
PdfLoadedDocument loadedDocument = new PdfLoadedDocument(data);
 
//Create a PDF document.
 
PdfDocument document = new PdfDocument();
 
//Set the Left Margin for a PdfDocument page.
 
document.PageSettings.Margins.Left = 50;
 
//Set the Right margin for a PdfDocument page.
 
document.PageSettings.Margins.Right = 50;
 
//Set the Top margin for a PdfDocument page.
 
document.PageSettings.Margins.Top = 0;
 
//Set the Bottom margin for a PdfDocument page.
 
document.PageSettings.Margins.Bottom = 0;
 
for (int i = 0; i < loadedDocument.Pages.Count; i++)
{
 
//Get the graphics client size.
 
SizeF size = loadedDocument.Pages[i].Graphics.ClientSize;
 
//Create the template from the page.
 
PdfTemplate template = loadedDocument.Pages[i].CreateTemplate();
 
// Set page orientation based on the existing size (by default Portrait).
 
if (size.Width > size.Height)
document.PageSettings.Orientation = PdfPageOrientation.Landscape;
 
//Set the existing page rotation to the current page.
 
document.PageSettings.Rotate = loadedDocument.Pages[0].Rotation;
 
//Add a page.
 
PdfPage page = document.Pages.Add();
 
// Create Pdf graphics for a page.
 
PdfGraphics graphics = page.Graphics;
 
//Draw a template.
 
graphics.DrawPdfTemplate(template,new PointF(0,0), new SizeF(page.GetClientSize().Width, page.GetClientSize().Height));
 
}
 
//Creating a stream object.
 
MemoryStream stream = new MemoryStream();
 
//Save a document into a stream.
 
document.Save(stream);
 
//Saves a document to disk.
 
System.IO.File.WriteAllBytes(outputFilePath, stream.ToArray());

Dim inputFilePath As String = "../../Data/sample.pdf"
Dim outputFilePath As String = "../../Data/output.pdf"
Dim data As Byte() = System.IO.File.ReadAllBytes(inputFilePath)
‘Load a PDF document.
 
Dim loadedDocument As PdfLoadedDocument = New PdfLoadedDocument(data)
 
‘Create a PDF document.
 
Dim document As PdfDocument = New PdfDocument()
 
‘Set the Left Margin for a PdfDocument page.
 
document.PageSettings.Margins.Left = 50
 
‘Set the Right Margin for a PdfDocument page.
 
document.PageSettings.Margins.Right = 50
 
‘Set the Top Margin for a PdfDocument page.
 
document.PageSettings.Margins.Top = 0
 
‘Set the Bottom Margin for a PdfDocument page.
 
document.PageSettings.Margins.Bottom = 0
For i As Integer = 0 To loadedDocument.Pages.Count - 1
   ‘Get the graphics client size.
 
   Dim size As SizeF = loadedDocument.Pages(i).Graphics.ClientSize
 
   ‘Create a template from a page.
 
   Dim template As PdfTemplate = loadedDocument.Pages(i).CreateTemplate()
 
   ‘Set page orientation based on the existing size (by default Portrait).
   If size.Width > size.Height Then document.PageSettings.Orientation = PdfPageOrientation.Landscape
 
   ‘Set the existing page rotation to the current page.
 
   document.PageSettings.Rotate = loadedDocument.Pages(0).Rotation
 
   ‘Add a page.
 
   Dim page As PdfPage = document.Pages.Add()
 
   ‘Create Pdf graphics for a page.
 
   Dim graphics As PdfGraphics = page.Graphics
 
   ‘Draw a template.
    graphics.DrawPdfTemplate(template, New PointF(0, 0), New SizeF(page.GetClientSize().Width, page.GetClientSize().Height))
Next
‘Creating a stream object.
 
Dim stream As MemoryStream = New MemoryStream()
 
‘Save a document into a stream.
 
document.Save(stream)
 
‘Saves a document to disk.
System.IO.File.WriteAllBytes(outputFilePath, stream.ToArray())