Don't Print DotNet PdfSharp

Hello! Below C/AL code don't works. pls advice.
I added variable dotnet
PDFPrint DotNet PdfSharp.Pdf.Printing.PdfFilePrinter.'PdfSharp, Version=1.32.2608.0, Culture=neutral, PublicKeyToken=f94615aa0424f9eb'
run next C/AL code:
PDFPrint := PDFPrint.PdfFilePrinter;
PDFPrint.PdfFileName('C:\1\TestForm.pdf');
PDFPrint.PrinterName(PDFPrint.DefaultPrinterName);
PDFPrint.Print(100); ( if i don't set milliseconds, then Nav freezes)
nothing occurs