NuGet QR Code Generator: Generate QR Codes in C# with Just a Few Lines of Code

How Do I Install a QR Code NuGet Package?

Installing IronQR through NuGet Package Manager takes seconds. Open the NuGet Package Manager Console in Visual Studio and run the following command, or use the dotnet add package command for CLI environments:

Install-Package IronQR

The NuGet package automatically handles all dependencies, ensuring compatibility with your target frameworks. IronQR supports .NET Framework 4.6.2+, .NET Core 2.0+, and .NET 5-10, making it a versatile .NET library for any Visual Studio project.

How Can I Generate My First QR Code?

Creating your first NuGet QR code requires minimal source code. The QrWriter class handles QR code and barcodes generation with sensible defaults:

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        // Generate a QR code from text data
        QrCode myQr = QrWriter.Write("Hello World");
        // Save QR code as bitmap image
        AnyBitmap qrImage = myQr.Save();
        // Export to PNG file
        qrImage.SaveAs("hello-qr.png");
    }
}

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        // Generate a QR code from text data
        QrCode myQr = QrWriter.Write("Hello World");
        // Save QR code as bitmap image
        AnyBitmap qrImage = myQr.Save();
        // Export to PNG file
        qrImage.SaveAs("hello-qr.png");
    }
}

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What Error Correction Levels Are Available?

QR codes support four error correction levels that determine how much damage a code can sustain while remaining scannable. IronQR supports encoding all levels through the QrOptions class:

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        // Configure high error correction level
        var options = new QrOptions(QrErrorCorrectionLevel.High);
        // Generate QR code with options
        QrCode qr = QrWriter.Write("https://ironsoftware.com", options);
        AnyBitmap image = qr.Save();
        image.SaveAs("high-correction-qr.png");
    }
}

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        // Configure high error correction level
        var options = new QrOptions(QrErrorCorrectionLevel.High);
        // Generate QR code with options
        QrCode qr = QrWriter.Write("https://ironsoftware.com", options);
        AnyBitmap image = qr.Save();
        image.SaveAs("high-correction-qr.png");
    }
}

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How Do I Customize QR Code Appearance?

IronQR provides extensive styling options through QrStyleOptions, enabling custom colors, dimensions (set as an int), margins, and logo embedding:

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        // Create styled QR code with custom colors
        var styleOptions = new QrStyleOptions
        {
            Dimensions = 300,
            Margins = 10,
            Color = Color.DarkBlue,
            BackgroundColor = Color.White
        };
        QrCode qr = QrWriter.Write("https://example.com");
        AnyBitmap styledImage = qr.Save(styleOptions);
        styledImage.SaveAs("styled-qr.png");
    }
}

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        // Create styled QR code with custom colors
        var styleOptions = new QrStyleOptions
        {
            Dimensions = 300,
            Margins = 10,
            Color = Color.DarkBlue,
            BackgroundColor = Color.White
        };
        QrCode qr = QrWriter.Write("https://example.com");
        AnyBitmap styledImage = qr.Save(styleOptions);
        styledImage.SaveAs("styled-qr.png");
    }
}

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How Do I Save QR Codes to Different Output Formats?

IronQR supports multiple output formats including PNG, JPEG, GIF, TIFF, BMP, and SVG. The SaveAs method automatically detects the format from the file extension:

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        QrCode qr = QrWriter.Write("Format demo");
        AnyBitmap image = qr.Save();
        // Save to different PNG file formats
        image.SaveAs("qr-output.png");
        image.SaveAs("qr-output.jpg");
        image.SaveAs("qr-output.gif");
        // Get as byte array for streams
        byte[] pngBytes = image.ExportBytes();
    }
}

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        QrCode qr = QrWriter.Write("Format demo");
        AnyBitmap image = qr.Save();
        // Save to different PNG file formats
        image.SaveAs("qr-output.png");
        image.SaveAs("qr-output.jpg");
        image.SaveAs("qr-output.gif");
        // Get as byte array for streams
        byte[] pngBytes = image.ExportBytes();
    }
}

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How Does IronQR Compare to QRCoder?

The QRCoder library is a popular open-source library for QR code generation. However, developers who previously had to run install package qrcoder often found the multi-step process involving qrcodeimage qrcode.getgraphic calls cumbersome. Unlike some community libraries that may have been last updated months ago, IronQR offers several advantages for enterprise development:

While the package QRCoder works well for basic generation, IronQR's machine learning model provides superior QR code reading from any angle, critical for applications processing user-submitted images. The new QRCodeGenerator approach in IronQR (QrWriter) requires fewer lines of code than QRCoder's multi-step process involving QRCodeGenerator, QRCodeData, and QRCode rendering classes.

How Can I Encode Binary Data?

Beyond text, IronQR supports encoding byte arrays for binary QR code data:

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        // Encode binary data
        byte[] binaryData = System.Text.Encoding.UTF8.GetBytes("Binary content");
        QrCode qr = QrWriter.Write(binaryData);
        qr.Save().SaveAs("binary-qr.png");
    }
}

using IronQr;
using IronSoftware.Drawing;
class Program
{
    static void Main(string[] args)
    {
        // Encode binary data
        byte[] binaryData = System.Text.Encoding.UTF8.GetBytes("Binary content");
        QrCode qr = QrWriter.Write(binaryData);
        qr.Save().SaveAs("binary-qr.png");
    }
}

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Conclusion

IronQR transforms QR code generation from a complex task into a straightforward integration. With NuGet installation, cross-platform compatibility, and features to embed codes in PDFs and ML-powered reading, it provides all the core features needed for professional .NET applications.

The library's intuitive API means developers can generate QR codes, apply custom styling, and export to multiple formats without wrestling with platform limitations or sparse documentation.

Get started with a free trial to explore the full feature set, or purchase a license for production deployment with commercial support.