barcode reader

Using Free Barcode API, developers are able to read most often used Linear, 2D and Postal barcodes, detecting them anywhere, with any orientation.

The component is available on codeplex: http://freebarcode.codeplex.com/

You can try pqScan barcode scanner, it can read all popular used 1d and 2d barcodes.

you need library to scan linear or 2d barcodes,

http://www.barcodelib.com/csharp/barcode_reader_csharp.html