How to underline or strike text

GemBox.Pdf
2

Hi Florian,

Try this:

using var document = new PdfDocument();
var page = document.Pages.Add();

using var formattedText = new PdfFormattedText();

formattedText.Underline = new PdfTextDecoration(
    style: PdfTextDecorationStyle.Single,
    wordsOnly: false,
    thickness: 4,
    color: PdfColors.Red,
    opacity: 1,
    dashPattern: PdfLineDashPatterns.Solid);

formattedText.Append("Hello World!");

page.Content.DrawText(formattedText, new PdfPoint(100, 700));

document.Save("output.pdf");

I hope this helps, let me know if you need anything else.

Regards,
Mario