.NET QR Code Generator Library
How to create, make, generate QR Code using C#, vb.net in asp.net mvc with free c# open source example code

     using KeepAutomation.Barcode.Bean;

     BarCode qrcode = new BarCode();
     qrcode.Symbology = KeepAutomation.Barcode.Symbology.QRCode;
     qrcode.QRCodeVersion = KeepAutomation.Barcode.QRCodeVersion.V10;
     qrcode.QRCodeECL = KeepAutomation.Barcode.QRCodeECL.M;
     qrcode.CodeToEncode = "0123456789";
     qrcode.X = 3;
     qrcode.Y = 3;
     qrcode.TopMargin = 12;
     qrcode.BottomMargin = 12;
     qrcode.LeftMargin = 12;
     qrcode.RightMargin = 12;
     qrcode.QRCodeDataMode = KeepAutomation.Barcode.QRCodeDataMode.Auto;
     qrcode.generateBarcodeToImageFile("c://qrcode-csharp.png");

     Dim qrcode As KeepAutomation.Barcode.Bean.BarCode = New KeepAutomation.Barcode.Bean.BarCode

     qrcode.Symbology = KeepAutomation.Barcode.Symbology.QRCode
     qrcode.QRCodeVersion = KeepAutomation.Barcode.QRCodeVersion.V10
     qrcode.QRCodeECL = KeepAutomation.Barcode.QRCodeECL.M
     qrcode.CodeToEncode = "0123456789"
     qrcode.X = 3
     qrcode.Y = 3
     qrcode.TopMargin = 12
     qrcode.BottomMargin = 12
     qrcode.LeftMargin = 12
     qrcode.RightMargin = 12
     qrcode.generateBarcodeToImageFile("c:/qrcode-vbnet.png")

     BarCode qrcode = new BarCode();
     qrcode.Symbology = KeepAutomation.Barcode.Symbology.QRCode;

     //Select a QR Code supported data mode according to your code:
     //AlphaNumeric: for 0 - 9, upper case letters A - Z, and nine punctuation characters space, $ % * + - . / :
     //Byte data: for (ISO/IEC 8859-1) encoding characters at 8 bits per character
     //Kanji Characters (JIS)
     //Numeric: for digits 0 - 9
     qrcode.QRCodeDataMode = QRCodeDataMode.Auto;

     //Input your QR Code encoding data:
     qrcode.CodeToEncode = "C#QRCodeGenerator";

     // Unit of measure, pixel, cm and inch supported.
     qrcode.BarcodeUnit = BarcodeUnit.Pixel;
     // QR Code image resolution in dpi
     qrcode.DPI = 72;
     // QR Code bar module width (X dimention)
     qrcode.X = 3;
     // QR Code bar module height (Y dimention), Y=X
     qrcode.Y = 3;

     // QR Code image left margin size, the minimum value is 4X.
     qrcode.LeftMargin = 12;
     // Image right margin size, minimum value is 4X.
     qrcode.RightMargin = 12;
     // Image top margin size, minimum value is 4X.
     qrcode.TopMargin = 12;
     // Image bottom margin size, minimum value is 4X.
     qrcode.BottomMargin = 12;

     // QR Code orientation, 90, 180, 270 degrees supported.
     qrcode.Orientation = KeepAutomation.Barcode.Orientation.Degree0;

     // QR Code barcode version, valid from V1-V40
     qrcode.QRCodeVersion = QRCodeVersion.V5;

     // QR Code barcode Error Correction Lever, supporting H, L, M, Q.
     qrcode.QRCodeECL = QRCodeECL.H;

     // QR Code image formats, supporting Png, Jpeg, Gif, Tiff, Bmp, etc.
     qrcode.ImageFormat = ImageFormat.Png;

     // Generate QR Code barcodes in image format GIF
     qrcode.generateBarcodeToImageFile("C://barcode-qrcode-csharp.png");

     /* Create QR Code barcodes in Stream object
     qrcode.generateBarcodeToStream(".NET System.IO.Stream Object");

     Draw & Print QR Code barcodes to Graphics object
     qrcode.generateBarcodeToGraphics(".NET System.Drawing.Graphics Object");

     Generate QR Code barcodes & write to byte[]
     byte[] barcodeInBytes = qrcode.generateBarcodeToByteArray();

     Generate QR Code barcodes & encode to System.Drawing.Bitmap object
     Bitmap barcodeInBitmap = qrcode.generateBarcodeToBitmap();
     */

     Dim qrcode As KeepAutomation.Barcode.Bean.BarCode = New KeepAutomation.Barcode.Bean.BarCode
     qrcode.Symbology = KeepAutomation.Barcode.Symbology.QRCode

     'QR Code Version options, V1-V40 supported.
     qrcode.QRCodeVersion = KeepAutomation.Barcode.QRCodeVersion.V10
     'QR Code Version Error Correction Level, 4 modes (H, L, M, Q) supported.
     qrcode.QRCodeECL = KeepAutomation.Barcode.QRCodeECL.H
     'QR Code data mode, supporting AlphaNumeric, Auto, Byte, Customer, Kanji, Numeric
     qrcode.QRCodeDataMode = KeepAutomation.Barcode.QRCodeDataMode.Auto
     'Set QR Code valid input: All ASCII characters, including 0-9, A-Z, a-z, special characters. Length: variable.   
     qrcode.CodeToEncode = "vbQRCode"

     'QR Code unit of measure: pixel, cm and inch  
     qrcode.BarcodeUnit = KeepAutomation.Barcode.BarcodeUnit.Pixel
     'QR Code image resolution in dpi
     qrcode.DPI = 72

     'QR Code Size-related Settings
     'QR Code bar module width (X dimention)
     qrcode.X = 2
     'QR Code bar module height (Y dimention), Y=X
     qrcode.Y = 2
     'Image margin size, minimum value is 4X on all four sides according to specification.
     qrcode.LeftMargin = 8
     qrcode.RightMargin = 8
     qrcode.TopMargin = 8
     qrcode.BottomMargin = 8
     'Generate Data Matrix in Png, Jpeg, Gif, Bmp, Tiff image formats.
     qrcode.ImageFormat = Drawing.Imaging.ImageFormat.Png
     qrcode.generateBarcodeToImageFile("C://qrcode_4_vb.png")