// Telerik — generates a QR code, then cannot read it back
var qrBarcode = new RadBarcode();
qrBarcode.Value = "https://example.com/order/4821";
qrBarcode.Symbology = new QRCode { ErrorCorrectionLevel = ErrorCorrectionLevel.H };
// Save to file...

// Attempt to read the same QR code:
var reader = new RadBarcodeReader();
// DecodeType.QR does not exist — QR cannot be added to this list
reader.DecodeTypes = new[] { DecodeType.Code128, DecodeType.EAN13 };
var bitmap = new BitmapImage(new Uri("qr-output.png", UriKind.Absolute));
var result = reader.Decode(bitmap);
// result == null — always, for any QR code image

' Telerik — generates a QR code, then cannot read it back
Dim qrBarcode As New RadBarcode()
qrBarcode.Value = "https://example.com/order/4821"
qrBarcode.Symbology = New QRCode With {.ErrorCorrectionLevel = ErrorCorrectionLevel.H}
' Save to file...

' Attempt to read the same QR code:
Dim reader As New RadBarcodeReader()
' DecodeType.QR does not exist — QR cannot be added to this list
reader.DecodeTypes = New DecodeType() {DecodeType.Code128, DecodeType.EAN13}
Dim bitmap As New BitmapImage(New Uri("qr-output.png", UriKind.Absolute))
Dim result = reader.Decode(bitmap)
' result == null — always, for any QR code image

// NuGet: dotnet add package IronBarcode
using IronBarCode;

IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY";

// Generate a QR code
BarcodeWriter.CreateBarcode("https://example.com/order/4821", BarcodeEncoding.QRCode)
             .SaveAsPng("qr-output.png");

// Read that same QR code back — no format specification needed
var results = BarcodeReader.Read("qr-output.png");
Console.WriteLine(results.First().Value);
// Output: https://example.com/order/4821

Imports IronBarCode

IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY"

' Generate a QR code
BarcodeWriter.CreateBarcode("https://example.com/order/4821", BarcodeEncoding.QRCode) _
             .SaveAsPng("qr-output.png")

' Read that same QR code back — no format specification needed
Dim results = BarcodeReader.Read("qr-output.png")
Console.WriteLine(results.First().Value)
' Output: https://example.com/order/4821

# WPF
dotnet remove package Telerik.UI.for.Wpf.60.Xaml

# WinForms
dotnet remove package Telerik.UI.for.WinForms.Common
dotnet remove package Telerik.UI.for.WinForms.Barcode

# Blazor
dotnet remove package Telerik.UI.for.Blazor

dotnet add package IronBarcode

// Remove these namespace imports:
// using Telerik.Windows.Controls.Barcode;      // WPF reader and generator
// using Telerik.Windows.Controls;              // WPF general
// using Telerik.WinControls.UI;               // WinForms
// using Telerik.WinControls.UI.Barcode;        // WinForms barcode reader

// Add this:
using IronBarCode;

Imports IronBarCode

// Remove:
// Telerik.WinControls.TelerikLicenseManager.InstallLicense("key");

// Add at application startup (Program.cs, App.xaml.cs, or composition root):
IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY";

' Remove:
' Telerik.WinControls.TelerikLicenseManager.InstallLicense("key")

' Add at application startup (Program.vb, App.xaml.vb, or composition root):
IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY"

<Window xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation">
    <telerik:RadBarcode Value="PROD-2026-00184" Symbology="Code128" />
</Window>

// NuGet: dotnet add package IronBarcode
using IronBarCode;

// Save to file — replaces XAML generation + manual export
BarcodeWriter.CreateBarcode("PROD-2026-00184", BarcodeEncoding.Code128)
             .ResizeTo(400, 100)
             .SaveAsPng("barcode.png");

// Display in WPF — assign to an Image control's Source property
var bitmapSource = BarcodeWriter.CreateBarcode("PROD-2026-00184", BarcodeEncoding.Code128)
                                .ToBitmapSource();
barcodeImageControl.Source = bitmapSource;

// Serve in Blazor or ASP.NET Core — return as base64 src attribute
byte[] bytes = BarcodeWriter.CreateBarcode("PROD-2026-00184", BarcodeEncoding.Code128)
                            .ResizeTo(400, 100)
                            .ToPngBinaryData();
string imgSrc = $"data:image/png;base64,{Convert.ToBase64String(bytes)}";

Imports IronBarCode

' Save to file — replaces XAML generation + manual export
BarcodeWriter.CreateBarcode("PROD-2026-00184", BarcodeEncoding.Code128) _
             .ResizeTo(400, 100) _
             .SaveAsPng("barcode.png")

' Display in WPF — assign to an Image control's Source property
Dim bitmapSource = BarcodeWriter.CreateBarcode("PROD-2026-00184", BarcodeEncoding.Code128) _
                                .ToBitmapSource()
barcodeImageControl.Source = bitmapSource

' Serve in Blazor or ASP.NET Core — return as base64 src attribute
Dim bytes As Byte() = BarcodeWriter.CreateBarcode("PROD-2026-00184", BarcodeEncoding.Code128) _
                                   .ResizeTo(400, 100) _
                                   .ToPngBinaryData()
Dim imgSrc As String = $"data:image/png;base64,{Convert.ToBase64String(bytes)}"

using Telerik.Windows.Controls.Barcode;
using System.Windows.Media.Imaging;

public string ReadProductBarcode(string imagePath)
{
    var reader = new RadBarcodeReader();
    reader.DecodeTypes = new DecodeType[]
    {
        DecodeType.Code128,
        DecodeType.Code39,
        DecodeType.EAN13,
        DecodeType.EAN8,
        DecodeType.UPCA,
        DecodeType.UPCE,
        DecodeType.Codabar,
        DecodeType.ITF
    };

    var bitmap = new BitmapImage(new Uri(imagePath, UriKind.Absolute));
    var result = reader.Decode(bitmap);

    return result?.Text ?? "No barcode found";
}

Imports Telerik.Windows.Controls.Barcode
Imports System.Windows.Media.Imaging

Public Function ReadProductBarcode(imagePath As String) As String
    Dim reader = New RadBarcodeReader()
    reader.DecodeTypes = New DecodeType() {
        DecodeType.Code128,
        DecodeType.Code39,
        DecodeType.EAN13,
        DecodeType.EAN8,
        DecodeType.UPCA,
        DecodeType.UPCE,
        DecodeType.Codabar,
        DecodeType.ITF
    }

    Dim bitmap = New BitmapImage(New Uri(imagePath, UriKind.Absolute))
    Dim result = reader.Decode(bitmap)

    Return If(result?.Text, "No barcode found")
End Function

using Telerik.WinControls.UI.Barcode;
using System.Drawing;

public string ReadShippingLabel(string imagePath)
{
    var reader = new RadBarcodeReader();
    reader.DecodeType = new DecodeType[]
    {
        DecodeType.Code128,
        DecodeType.ITF,
        DecodeType.EAN13
    };

    using var image = Image.FromFile(imagePath);
    var result = reader.Read(image);

    return result?.Text ?? "No barcode found";
}

Imports Telerik.WinControls.UI.Barcode
Imports System.Drawing

Public Function ReadShippingLabel(imagePath As String) As String
    Dim reader = New RadBarcodeReader()
    reader.DecodeType = New DecodeType() {
        DecodeType.Code128,
        DecodeType.ITF,
        DecodeType.EAN13
    }

    Using image = Image.FromFile(imagePath)
        Dim result = reader.Read(image)
        Return If(result?.Text, "No barcode found")
    End Using
End Function

// NuGet: dotnet add package IronBarcode
using IronBarCode;

public string ReadProductBarcode(string imagePath)
{
    var results = BarcodeReader.Read(imagePath);
    return results.FirstOrDefault()?.Value ?? "No barcode found";
}

Imports IronBarCode

Public Function ReadProductBarcode(imagePath As String) As String
    Dim results = BarcodeReader.Read(imagePath)
    Return If(results.FirstOrDefault()?.Value, "No barcode found")
End Function

// RadBarcodeReader does not support QR codes.
// DecodeType.QR does not exist in the Telerik enum.
public string ReadQrCode(string imagePath)
{
    throw new NotSupportedException(
        "Telerik RadBarcodeReader cannot read QR codes. " +
        "DecodeType.QR is not a valid enum value.");
}

' RadBarcodeReader does not support QR codes.
' DecodeType.QR does not exist in the Telerik enum.
Public Function ReadQrCode(imagePath As String) As String
    Throw New NotSupportedException("Telerik RadBarcodeReader cannot read QR codes. " & _
                                    "DecodeType.QR is not a valid enum value.")
End Function

// NuGet: dotnet add package IronBarcode
using IronBarCode;

public string ReadQrCode(string imagePath)
{
    // QR codes, DataMatrix, PDF417, and Aztec are all detected automatically
    var results = BarcodeReader.Read(imagePath);
    return results.FirstOrDefault()?.Value ?? "No QR code found";
}

Imports IronBarCode

Public Function ReadQrCode(imagePath As String) As String
    ' QR codes, DataMatrix, PDF417, and Aztec are all detected automatically
    Dim results = BarcodeReader.Read(imagePath)
    Return If(results.FirstOrDefault()?.Value, "No QR code found")
End Function

// No Telerik reading API available in ASP.NET Core.
// Workaround: forward uploaded file to a WPF or WinForms service
// that can reference Telerik.Windows.Controls.Barcode.
[HttpPost("read")]
public async Task<IActionResult> ReadBarcode(IFormFile imageFile)
{
    // Must proxy to desktop service — no Telerik reader available here
    var bytes = await ReadAllBytesAsync(imageFile);
    var result = await _desktopBridgeService.ReadAsync(bytes);
    return Ok(result);
}

Imports Microsoft.AspNetCore.Mvc

' No Telerik reading API available in ASP.NET Core.
' Workaround: forward uploaded file to a WPF or WinForms service
' that can reference Telerik.Windows.Controls.Barcode.
<HttpPost("read")>
Public Async Function ReadBarcode(imageFile As IFormFile) As Task(Of IActionResult)
    ' Must proxy to desktop service — no Telerik reader available here
    Dim bytes = Await ReadAllBytesAsync(imageFile)
    Dim result = Await _desktopBridgeService.ReadAsync(bytes)
    Return Ok(result)
End Function

// NuGet: dotnet add package IronBarcode
using IronBarCode;
using Microsoft.AspNetCore.Mvc;

[ApiController]
[Route("api/barcode")]
public class BarcodeController : ControllerBase
{
    [HttpPost("read")]
    public IActionResult ReadBarcode(IFormFile imageFile)
    {
        using var stream = imageFile.OpenReadStream();
        var results = BarcodeReader.Read(stream);
        return Ok(results.Select(r => new
        {
            Format = r.BarcodeType.ToString(),
            Value = r.Value
        }));
    }

    [HttpGet("generate")]
    public IActionResult GenerateBarcode([FromQuery] string data)
    {
        var bytes = BarcodeWriter.CreateBarcode(data, BarcodeEncoding.Code128)
                                 .ResizeTo(400, 100)
                                 .ToPngBinaryData();
        return File(bytes, "image/png");
    }
}

Imports IronBarCode
Imports Microsoft.AspNetCore.Mvc

<ApiController>
<Route("api/barcode")>
Public Class BarcodeController
    Inherits ControllerBase

    <HttpPost("read")>
    Public Function ReadBarcode(imageFile As IFormFile) As IActionResult
        Using stream = imageFile.OpenReadStream()
            Dim results = BarcodeReader.Read(stream)
            Return Ok(results.Select(Function(r) New With {
                .Format = r.BarcodeType.ToString(),
                .Value = r.Value
            }))
        End Using
    End Function

    <HttpGet("generate")>
    Public Function GenerateBarcode(<FromQuery> data As String) As IActionResult
        Dim bytes = BarcodeWriter.CreateBarcode(data, BarcodeEncoding.Code128) _
                                 .ResizeTo(400, 100) _
                                 .ToPngBinaryData()
        Return File(bytes, "image/png")
    End Function
End Class

// No direct PDF reading support in RadBarcodeReader.
// Workaround: use a separate PDF library to extract page images
using SomePdfLibrary; // third-party dependency
using Telerik.Windows.Controls.Barcode;

public List<string> ReadBarcodesFromPdf(string pdfPath)
{
    var results = new List<string>();
    var pages = PdfRenderer.ExtractPages(pdfPath); // third-party call

    foreach (var pageImage in pages)
    {
        var reader = new RadBarcodeReader();
        reader.DecodeTypes = new[] { DecodeType.Code128, DecodeType.EAN13 };
        var bitmap = ConvertToBitmapImage(pageImage); // conversion required
        var result = reader.Decode(bitmap);
        if (result != null)
            results.Add(result.Text); // 1D only — QR codes on PDF pages are missed
    }
    return results;
}

Imports SomePdfLibrary ' third-party dependency
Imports Telerik.Windows.Controls.Barcode

Public Function ReadBarcodesFromPdf(pdfPath As String) As List(Of String)
    Dim results As New List(Of String)()
    Dim pages = PdfRenderer.ExtractPages(pdfPath) ' third-party call

    For Each pageImage In pages
        Dim reader As New RadBarcodeReader()
        reader.DecodeTypes = New DecodeType() {DecodeType.Code128, DecodeType.EAN13}
        Dim bitmap = ConvertToBitmapImage(pageImage) ' conversion required
        Dim result = reader.Decode(bitmap)
        If result IsNot Nothing Then
            results.Add(result.Text) ' 1D only — QR codes on PDF pages are missed
        End If
    Next

    Return results
End Function

// NuGet: dotnet add package IronBarcode
using IronBarCode;

public List<string> ReadBarcodesFromPdf(string pdfPath)
{
    var results = BarcodeReader.Read(pdfPath);
    return results.Select(r =>
        $"Page {r.PageNumber}: {r.BarcodeType} — {r.Value}").ToList();
}

Imports IronBarCode

Public Function ReadBarcodesFromPdf(pdfPath As String) As List(Of String)
    Dim results = BarcodeReader.Read(pdfPath)
    Return results.Select(Function(r) $"Page {r.PageNumber}: {r.BarcodeType} — {r.Value}").ToList()
End Function

// In code-behind or ViewModel
using IronBarCode;

var generated = BarcodeWriter.CreateBarcode(barcodeValue, BarcodeEncoding.Code128)
                             .ResizeTo(400, 100);
BarcodeImage.Source = generated.ToBitmapSource();

Imports IronBarCode

' In code-behind or ViewModel
Dim generated = BarcodeWriter.CreateBarcode(barcodeValue, BarcodeEncoding.Code128) _
                             .ResizeTo(400, 100)
BarcodeImage.Source = generated.ToBitmapSource()

using IronBarCode;

var options = new BarcodeReaderOptions
{
    ExpectedBarcodeTypes = BarcodeEncoding.Code128 | BarcodeEncoding.EAN13
};
var results = BarcodeReader.Read(imagePath, options);

Imports IronBarCode

Dim options As New BarcodeReaderOptions With {
    .ExpectedBarcodeTypes = BarcodeEncoding.Code128 Or BarcodeEncoding.EAN13
}
Dim results = BarcodeReader.Read(imagePath, options)

// Remove:
// Telerik.WinControls.TelerikLicenseManager.InstallLicense("TELERIK-KEY");

// Add:
IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY";

' Remove:
' Telerik.WinControls.TelerikLicenseManager.InstallLicense("TELERIK-KEY")

' Add:
IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY"

# License initialization
grep -r "TelerikLicenseManager.InstallLicense" --include="*.cs" .

# XAML generation controls
grep -r "RadBarcode" --include="*.xaml" .
grep -r "TelerikBarcode" --include="*.razor" .

# Code-behind generation references
grep -r "RadBarcode" --include="*.cs" .
grep -r "Symbology\." --include="*.cs" .

# Reading API — WPF
grep -r "RadBarcodeReader" --include="*.cs" .
grep -r "DecodeTypes\." --include="*.cs" .
grep -r "reader\.Decode(" --include="*.cs" .

# Reading API — WinForms
grep -r "BarCodeReader" --include="*.cs" .
grep -r "DecodeType\." --include="*.cs" .
grep -r "reader\.Read(" --include="*.cs" .

# Result property access
grep -r "result\.Text" --include="*.cs" .
grep -r "result\.Symbology" --include="*.cs" .