Public Shared Sub ConvertToLinearizedFormat(inputPdfFilename As String, outputPdfFilename As String)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(inputPdfFilename)
        ' get liearized format
        Dim linearizedFormat As Vintasoft.Imaging.Pdf.PdfFormat = document.Format.GetLinearizedFormat()

        ' convert PDF document to linearized format
        If inputPdfFilename = outputPdfFilename Then
            document.Pack(linearizedFormat)
        Else
            document.Pack(outputPdfFilename, linearizedFormat)
        End If
    End Using
End Sub

public static void ConvertToLinearizedFormat(string inputPdfFilename, string outputPdfFilename)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = new Vintasoft.Imaging.Pdf.PdfDocument(inputPdfFilename))
    {
        // get liearized format
        Vintasoft.Imaging.Pdf.PdfFormat linearizedFormat = document.Format.GetLinearizedFormat();
        
        // convert PDF document to linearized format
        if (inputPdfFilename == outputPdfFilename)
            document.Pack(linearizedFormat);
        else
            document.Pack(outputPdfFilename, linearizedFormat);
    }
}