Blazor WASM PDF Generation with iTextSharp

I want to generate a PDF Document in Blazor WASM. I found examples with iTexSharp, so I did a small example.

Now I have two problems:

1. I have trouble with the image path to add an image in the pdf:

    `Image img = Image.GetInstance("images/test.png");
   

   How need I set the image reference to my "wwwroot/images" folder?

2. I get some error when I want to close my document with the command "document.Close()"

The error is:

System.Security.Cryptography.Algorithms is not supported on this 
platform.
System.PlatformNotSupportedException: System.Security.Cryptography.Algorithms is not supported on this platform.
   at System.Security.Cryptography.MD5.Create()
   at iTextSharp.text.pdf.PdfEncryption.CreateDocumentId()
   at iTextSharp.text.pdf.PdfWriter.Close()
   at iTextSharp.text.pdf.PdfDocument.Close()
   at iTextSharp.text.Document.Close()

Here is the whole code:

 _document = new Document(PageSize.A4, 10f, 10f, 20f, 30f);
        _pdfPTable.WidthPercentage = 50;
        _pdfPTable.HorizontalAlignment = Element.ALIGN_LEFT;
        _fontStyle = FontFactory.GetFont("Tahoma", 8f, 1);
        PdfWriter.GetInstance(_document, _memoryStream);
        _document.Open();

        float[] sizes = new float[_maxColumn];
        for (int i = 0; i < _maxColumn; i++)
        {
            if (i == 0) sizes[i] = 50;
            else sizes[i] = 100;
        }

        _pdfPTable.SetWidths(sizes);

        this.ReportHeader();
        this.ReporBody();

        _pdfPTable.HeaderRows = 2;
        _document.Add(_pdfPTable);
        _document.Close();

        return _memoryStream.ToArray();