''' <summary>
''' Verifies a PDF document to conformance with PDF/A-1b specification.
''' </summary>
''' <param name="pdfFilename">The filename of PDF document.</param>
Public Shared Sub VerifyDocumentToPdfA1b(pdfFilename As String)
    Dim verifier As New Vintasoft.Imaging.Pdf.Processing.PdfA.PdfA1bVerifier()
    System.Console.WriteLine("Verification...")
    If verifier.Verify(pdfFilename) Then
        System.Console.WriteLine("Document conforms to PDF/A-1b.")
    Else
        System.Console.WriteLine("Document does not conform to PDF/A-1b.")
    End If
End Sub

/// <summary>
/// Verifies a PDF document to conformance with PDF/A-1b specification.
/// </summary>
/// <param name="pdfFilename">The filename of PDF document.</param>
public static void VerifyDocumentToPdfA1b(string pdfFilename)
{
    Vintasoft.Imaging.Pdf.Processing.PdfA.PdfA1bVerifier verifier = 
        new Vintasoft.Imaging.Pdf.Processing.PdfA.PdfA1bVerifier();
    System.Console.WriteLine("Verification...");
    if (verifier.Verify(pdfFilename))
        System.Console.WriteLine("Document conforms to PDF/A-1b.");
    else
        System.Console.WriteLine("Document does not conform to PDF/A-1b.");
}