/// <summary>
/// Reads barcodes from an multipage TIFF file in WPF.
/// </summary>
/// <param name="filename">A path to a multipage TIFF file.</param>
/// <param name="barcodeTypes">A types of barcodes to recognize.</param>
public static void ReadBarcodesFromMiltipageTiffFile(string filename, Vintasoft.Barcode.BarcodeType barcodeTypes)
{
    // open TIFF file
    using (System.IO.Stream bitmapStream = System.IO.File.Open(filename, System.IO.FileMode.Open))
    {
        System.Windows.Media.Imaging.TiffBitmapDecoder decoder =
            new System.Windows.Media.Imaging.TiffBitmapDecoder(
                bitmapStream,
                System.Windows.Media.Imaging.BitmapCreateOptions.None,
                System.Windows.Media.Imaging.BitmapCacheOption.OnLoad);
        System.Windows.Media.Imaging.BitmapSource tiffImage;
        int pageCount = decoder.Frames.Count;

        // create the barcode reader
        using (Vintasoft.Barcode.BarcodeReader reader = new Vintasoft.Barcode.BarcodeReader())
        {
            // set barcode reader settings
            reader.Settings.ScanBarcodeTypes = barcodeTypes;

            // for each page
            for (int i = 0; i < pageCount; i++)
            {
                // select a page
                tiffImage = decoder.Frames[i];

                // read barcodes from image
                Vintasoft.Barcode.IBarcodeInfo[] barcodesInfo = Vintasoft.Barcode.WpfExtensions.ReadBarcodes(reader, tiffImage);

                // output information about barcodes
                System.Console.WriteLine(string.Format("Page {0}: ", i));
                if (barcodesInfo.Length == 0)
                {
                    System.Console.WriteLine("No barcodes found.");
                }
                else
                {
                    for (int j = 0; j < barcodesInfo.Length; j++)
                        System.Console.WriteLine(string.Format("[{0}] {1}", barcodesInfo[j].BarcodeType,
                                                                     barcodesInfo[j].Value));
                }
            }
        }
    }
}       

''' <summary>
''' Reads barcodes from an multipage TIFF file in WPF.
''' </summary>
''' <param name="filename">A path to a multipage TIFF file.</param>
''' <param name="barcodeTypes">A types of barcodes to recognize.</param>
Public Shared Sub ReadBarcodesFromMiltipageTiffFile(filename As String, barcodeTypes As Vintasoft.Barcode.BarcodeType)
    ' open TIFF file
    Using bitmapStream As System.IO.Stream = System.IO.File.Open(filename, System.IO.FileMode.Open)
        Dim decoder As New System.Windows.Media.Imaging.TiffBitmapDecoder(bitmapStream, System.Windows.Media.Imaging.BitmapCreateOptions.None, System.Windows.Media.Imaging.BitmapCacheOption.OnLoad)
        Dim tiffImage As System.Windows.Media.Imaging.BitmapSource
        Dim pageCount As Integer = decoder.Frames.Count

        ' create the barcode reader
        Using reader As New Vintasoft.Barcode.BarcodeReader()
            ' set barcode reader settings
            reader.Settings.ScanBarcodeTypes = barcodeTypes

            ' for each page
            For i As Integer = 0 To pageCount - 1
                ' select a page
                tiffImage = decoder.Frames(i)

                ' read barcodes from image
                Dim barcodesInfo As Vintasoft.Barcode.IBarcodeInfo() = Vintasoft.Barcode.WpfExtensions.ReadBarcodes(reader, tiffImage)

                ' output information about barcodes
                System.Console.WriteLine(String.Format("Page {0}: ", i))
                If barcodesInfo.Length = 0 Then
                    System.Console.WriteLine("No barcodes found.")
                Else
                    For j As Integer = 0 To barcodesInfo.Length - 1
                        System.Console.WriteLine(String.Format("[{0}] {1}", barcodesInfo(j).BarcodeType, barcodesInfo(j).Value))
                    Next
                End If
            Next
        End Using
    End Using
End Sub