Trying to print base64 document fails with 'parameter is not valid'

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I am trying this:
try
{
using (var memoryStream = new MemoryStream(pdfBytes))
{
// Load the PDF document
PdfSharp.Pdf.PdfDocument pdfDocument = PdfReader.Open(memoryStream, PdfDocumentOpenMode.ReadOnly);

// Print each page
for (int i = 0; i pdfDocument.PageCount; i++)
{
using (var printDocument = new PrintDocument())
{
printDocument.PrinterSettings.PrinterName = printerName;

// Handle the PrintPage event
printDocument.PrintPage += (sender, e) =
{
PdfSharp.Events.RenderEvents renderEvents = new PdfSharp.Events.RenderEvents();
XGraphics graphics = XGraphics.FromGraphics(e.Graphics, new XSize(e.MarginBounds.Width, e.MarginBounds.Height), renderEvents);

// Get the current page to print
var page = pdfDocument.Pages[i];
var pageWidth = page.Width;
var pageHeight = page.Height;

// Calculate the scale to fit the page
var scaleX = e.MarginBounds.Width / pageWidth;
var scaleY = e.MarginBounds.Height / pageHeight;
var scale = Math.Min(scaleX, scaleY);

// Center the page on the printer
var xPos = e.MarginBounds.Left + (e.MarginBounds.Width - (pageWidth * scale)) / 2;
var yPos = e.MarginBounds.Top + (e.MarginBounds.Height - (pageHeight * scale)) / 2;

// Draw the content of the PDF page
XImage xImage = XImage.FromStream(memoryStream);
graphics.DrawImage(xImage, xPos, yPos, pageWidth * scale, pageHeight * scale);

// Draw rectangle for the page border
graphics.DrawRectangle(XPens.Black, xPos, yPos, pageWidth * scale, pageHeight * scale);
};

// Trigger the print job
printDocument.Print();
}
}
}
}

try
{
using (var memoryStream = new MemoryStream(pdfBytes))
{
// Load the PDF document
PdfSharp.Pdf.PdfDocument pdfDocument = PdfReader.Open(memoryStream, PdfDocumentOpenMode.ReadOnly);

// Print each page
for (int i = 0; i pdfDocument.PageCount; i++)
{
using (var printDocument = new PrintDocument())
{
printDocument.PrinterSettings.PrinterName = printerName;

// Handle the PrintPage event
printDocument.PrintPage += (sender, e) =
{
PdfSharp.Events.RenderEvents renderEvents = new PdfSharp.Events.RenderEvents();
XGraphics graphics = XGraphics.FromGraphics(e.Graphics, new XSize(e.MarginBounds.Width, e.MarginBounds.Height), renderEvents);

// Get the current page to print
var page = pdfDocument.Pages[i];
var pageWidth = page.Width;
var pageHeight = page.Height;

// Calculate the scale to fit the page
var scaleX = e.MSource of the question:

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