public static readonly SizeF pageSize = PdfPageSize.A4;
public static readonly float MarginLeft = CmInPixel(2.3);
public static readonly float MarginRight = CmInPixel(2);
public static readonly float MarginTop = CmInPixel(4.5);
public static readonly float MarginBottom = CmInPixel(3.3);

public static float CanvasWidth => pageSize.Width - MarginLeft - MarginRight;
public static float CanvasHeigth => pageSize.Height - MarginTop - MarginBottom;

public static float CmInPixel(double cm)
{
    return (float)(cm / 2.54f * 72f);
}

public static double PixelInCm(float pixel)
{
    return pixel / 72f * 2.54f;
}

public async void TestPDF()
{
    PdfDocument document = new();
    PdfPageSettings pagesettings = new()
    {
        Size = pageSize
    };

    pagesettings.SetMargins(0, 0, 0, 0);
    document.PageSettings = pagesettings;
    var initialpage = document.Pages.Add();
    PdfLayoutResult layoutResult = new(initialpage, new(0, 0, 0, 0));
    PdfGrid grid = new();
    grid.Columns.Add(2);
    for (int i = 1; i <= 37; i++)
    {
        PdfGridRow row = grid.Rows.Add();
        row.Cells[0].Value = (i.ToString());
    }
    grid.AllowRowBreakAcrossPages = true;
    RectangleF bounds = new()
    {
        X = MarginLeft,
        Y = Math.Max(layoutResult.Bounds.Bottom, MarginTop),
        Width = CanvasWidth,
        Height = CanvasHeigth - Math.Max(layoutResult.Bounds.Bottom, MarginTop) + MarginTop
    };
    PdfLayoutFormat layoutFormat = new()
    {
        Break = PdfLayoutBreakType.FitPage,
        Layout = PdfLayoutType.Paginate,
        PaginateBounds = new()
        {
            X = MarginLeft,
            Y = MarginTop,
            Width = CanvasWidth,
            Height = CanvasHeigth
        },
    };
    layoutResult = grid.Draw(layoutResult.Page, bounds, layoutFormat);
    layoutResult.Page.Graphics.DrawRectangle(PdfPens.Red, layoutResult.Bounds);
    Debug.WriteLine($"Grid Height: {grid.Rows.Count * grid.Rows[0].Height}");
    Debug.WriteLine($"LayoutResult Bounds: {layoutResult.Bounds.Height}");
    MemoryStream documentStream = new();
    document.Save(documentStream);
    await js.OpenInNewTab(documentStream.ToArray());
}