PeachPDF
PeachPDF.PdfGenerateConfig
PdfGenerateConfig.PdfAConformance Property
The PDF/A (ISO 19005) conformance level to target. Defaults to None - no PDF/A-specific work is done (see None for exactly what that means). See PdfAConformance for what each other level requires, including PDF/A-1’s restriction on transparency and the accessible “A” levels’ language requirement. Requesting any level other than None implicitly enables an XMP metadata stream for that render regardless of EnableXmpMetadata.
public PeachPDF.PdfAConformance PdfAConformance { get; set; }