A code that generates a PDF document for testing (requires iTextSharp)

PdfGenerator.cs

using System;
using System.IO;

using iText.Kernel.Colors;
using iText.Kernel.Pdf;
using iText.Layout;
using iText.Layout.Element;

public class Program
{
    public static void Main(string[] args) =>
        new Document(new PdfDocument(new PdfWriter(new FileStream(
            Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), $"{Guid.NewGuid()}.pdf"),
            FileMode.Create,
            FileAccess.ReadWrite))))
        .Add(new Paragraph($"Testing document: {DateTime.Now.ToString("dd-MMM-yyyy HH:mm:ss")}").SetBackgroundColor(new DeviceRgb(
            new Random().Next(122, 255),
            new Random().Next(122, 255),
            new Random().Next(122, 255))))
        .Close();
}