Amazing, it's convenient for game users.
I googled and found some introduction about QR code:
QR Code stands for Quick Response Code. QR Code is a 2D (2-dimensional) matrix symbology which developed first used for automotive applications by DENSO in 1994. QR Code enables customers learn more information about the product or business by scanning the barcode. QR Code could encode numbers, character digits, text, URL, data bytes and images in a relevantly small space. It is widely used in tracking, entertainment and ticketing system at present.
.NET Barcode Generation SDK is able to generate and create over 20 linear, postal & 2D barcodes, including QR Code, Data Matrix, PDF-417, Code 39, Code 128, EAN 13, GS1 128, Intelligent Mail, UPC-A, etc in accordance with the latest barcode specification in ISO or GS1 system.http://www.businessrefinery.com/products/barcode_net/net_barcode_generator.html