How to Convert TIFF to PDF in VB.NET?

Imports System.IO
Imports PQScan.ImageToPDF

Namespace TiffImageToPDF
    Class Program
        Private Shared Sub Main(args As String())
            'Create an instance of PQScan.ImageToPDF.PDFConverter object.
            Dim converter As New PDFConverter()
            'Set PDF page layout, if to ImageSize, 
            'PDF page will display the original size and quality of the source image
            converter.PageSizeType = PageSizeMode.ImageSize

            'Set input image from file streams.
            Dim streams As FileStream() = New FileStream(0) {}
            streams(0) = New FileStream("single-page.tif", FileMode.Open)

            'Set output pdf file name.
            Dim outFile As String = "single-page.pdf"

            'Generate PDF from single page tiff.
            converter.CreatePDF(streams, outFile)
        End Sub
    End Class
End Namespace

Imports System.IO
Imports PQScan.ImageToPDF

Namespace TiffImageToPDF
    Class Program
        Private Shared Sub Main(args As String())
            'Create an instance of PQScan.ImageToPDF.PDFConverter object.
            Dim converter As New PDFConverter()

            'Set PDF page layout, A4 is most widely used.
            converter.PageSizeType = PageSizeMode.A4

            'Set input image from file streams.
            Dim streams As FileStream() = New FileStream(0) {}
            streams(0) = New FileStream("multiple-page.tif", FileMode.Open)

            'Set output pdf file name.
            Dim outFile As String = "multi-page.pdf"

            'Generate PDF from multiple page tiff.
            converter.CreatePDF(streams, outFile)
        End Sub
    End Class
End Namespace