Here we save a document in PDF/A-1b format.
using var doc = new Doc();
doc.Read("../mypics/Acrobat.pdf");
string path = "pdfa_save.pdf";
using (var theOperation = new PdfConformityOperation()) {
theOperation.Conformance = PdfConformance.PdfA1b;
theOperation.Save(doc, path);
if (theOperation.Errors.Count > 0) {
Console.WriteLine("Errors:");
for (int i = 0; i < theOperation.Errors.Count; ++i)
Console.WriteLine(theOperation.Errors[i]);
}
}