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Using Custom Language Files
using IronOcr;
using System;


var ocrTesseract = new IronTesseract();

ocrTesseract.UseCustomTesseractLanguageFile("custom_tesseract_files/custom.traineddata");

using var ocrInput = new OcrInput();
ocrInput.LoadImage(@"images\image.png");

var ocrResult = ocrTesseract.Read(ocrInput);
Console.WriteLine(ocrResult.Text);
Imports IronOcr
Imports System

Dim ocrTesseract As New IronTesseract()

ocrTesseract.UseCustomTesseractLanguageFile("custom_tesseract_files/custom.traineddata")

Using ocrInput As New OcrInput()
    ocrInput.LoadImage("images\image.png")

    Dim ocrResult = ocrTesseract.Read(ocrInput)
    Console.WriteLine(ocrResult.Text)
End Using
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PM > Install-Package IronOcr
Using Custom Language Files

Using Custom Language Files

Iron Tesseract OCR fully supports custom or downloaded languages and fonts following the Tesseract .traineddata file format standard (version 4 or above). You can find such files commonly on Github.com.

If you wish to train your own custom font support or language pack, we recommend reading our tutorial on creating custom Tesseract language packs.

Explore OCR Multi-Language Support in C# with IronOCR
View on GitHub

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C# NuGet Library for PDF
Install with NuGet

Version: 2026.10

PM > Install-Package IronOcr
nuget.org/packages/IronOcr/
  1. In Solution Explorer, right-click References, Manage NuGet Packages
  2. Select Browse and search "IronOCR"
  3. Select the package and install
C# PDF DLL
Download DLL

Version: 2026.10

or download Windows Installer here.

  1. Download and unzip IronOCR to a location such as ~/Libs within your Solution directory
  2. In Visual Studio Solution Explorer, right click References. Select Browse, "IronOCR.dll"

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