How to create a PDF and load to PdfViewer without saving to disk?

<Grid x:Name="pdfViewGrid">
          <syncfusion:SfPdfViewer x:Name="pdfViewerControl" />
 </Grid>

private Stream CreateNewPDF()
{
      MemoryStream memoryStream = new MemoryStream();
 
      //Create a new PDF document
      PdfDocument document = new PdfDocument();
 
      // Set the page size
      document.PageSettings.Size = PdfPageSize.A4;
 
      //Add a page to the document
      PdfPage page = document.Pages.Add();
 
      //Create PDF graphics for the page
      PdfGraphics graphics = page.Graphics;
 
      //Set the font
      PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 20);
 
      //Draw the text
      graphics.DrawString("Hello World!!!", font, PdfBrushes.Black, new PointF(0, 0));
 
      //Save the document
      document.Save(memoryStream);
 
      //Close the document
      document.Close(true);
 
      if (memoryStream.CanSeek)
               memoryStream.Position = 0;
            
      return memoryStream;
}  

public MainPage()
{
    InitializeComponent();
    Stream fileStream = CreateNewPDF();
    pdfViewerControl.LoadDocument(fileStream);
}