using IronPdf; // Disable local disk access or cross-origin requests Installation.EnableWebSecurity = true; // Instantiate Renderer var renderer = new ChromePdfRenderer(); // Create a PDF from a HTML string using C# var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>"); // Export to a file or Stream pdf.SaveAs("output.pdf"); // Advanced Example with HTML Assets // Load external html assets: Images, CSS and JavaScript. // An optional BasePath 'C:\site\assets\' is set as the file location to load assets from var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\"); myAdvancedPdf.SaveAs("html-with-assets.pdf");

.NET HELP

What is .NET Framework 3.5 (PDF,Excel,Qr,Barcode,OCR)

ByChipego Kalinda

April 18, 2023

Updated June 22, 2025

The .NET Framework has been a cornerstone of software development for years, providing developers with a powerful and versatile platform for building applications. One such application is IronPDF, a robust PDF generation library that is compatible with both legacy .NET Frameworks like .NET 3.5 and the latest .NET technology, .NET 7. In this article, we will delve into the compatibility of programs using IronPDF with these diverse frameworks and introduce two other powerful libraries, IronXL and IronOCR.

.NET 3.5, released in 2007, is a version of the .NET Framework that introduced a range of new features and improvements. It included enhancements like Language Integrated Query (LINQ), Windows Presentation Foundation (WPF), and Windows Communication Foundation (WCF), which expanded the capabilities of .NET applications. Although .NET 3.5 is a legacy framework, many applications still rely on it, necessitating support for libraries like IronPDF.

IronPDF: A Powerful PDF Generation Library

IronPDF homepage

IronPDF Library Overview is a comprehensive library for generating, editing, and extracting data from PDF files in .NET applications. With an intuitive API, developers can effortlessly create new PDF documents with IronPDF, manipulate existing ones, add images and text, and extract data for further processing. IronPDF is designed to work seamlessly with a wide range of .NET Frameworks, including both legacy and the latest .NET technologies.

Compatibility with Legacy .NET Framework 3.5

Despite its age, .NET 3.5 remains a vital framework for many developers. IronPDF recognizes the importance of supporting legacy .NET applications and ensures compatibility with the .NET 3.5 Framework. This compatibility allows developers to integrate and install IronPDF into their existing .NET 3.5 applications without the need for major code changes or upgrades.

Embracing the Latest .NET Technology: .NET 7 Compatibility

As the .NET ecosystem evolves, so does IronPDF. With the release of .NET 7, the library has been updated to ensure compatibility with the latest .NET technology. By leveraging the new features and performance improvements of .NET 7, IronPDF can offer developers enhanced performance, scalability, and security for their PDF generation and manipulation tasks.

Compatibility

Introducing IronXL and IronOCR: Seamless Integration with .NET Technologies

Explore IronXL for Excel is a powerful Excel library for .NET applications that allows developers to read Excel files in C#, write, and manipulate Excel files with ease. Discover IronOCR for Text Extraction is an advanced OCR library for .NET developers that enables extracting text from images and PDF files. Both libraries are designed to work seamlessly with a wide range of .NET frameworks, including .NET 3.5 and .NET 7, ensuring maximum compatibility and flexibility for developers.

Conclusion

IronPDF is a robust PDF generation library that is compatible with both legacy .NET Frameworks like .NET 3.5 and the latest .NET technology, .NET 7. By providing support for a diverse range of .NET applications, IronPDF allows developers to leverage its powerful features across different frameworks. Additionally, IronXL and IronOCR offer seamless integration with .NET technologies, further expanding the capabilities of .NET applications. With these tools at their disposal, developers can build feature-rich, efficient, and secure applications with ease. Whether it's generating reports, invoices, or receipts, or extracting data from PDF files, IronPDF, IronXL, and IronOCR can provide the necessary tools to accomplish these tasks. The flexibility and compatibility of these libraries make them indispensable for any .NET developer looking to enhance the functionality and capabilities of their applications.

Frequently Asked Questions

What is the .NET Framework 3.5?

.NET Framework 3.5, released in 2007, introduced new features like Language Integrated Query (LINQ), Windows Presentation Foundation (WPF), and Windows Communication Foundation (WCF), enhancing the capabilities of .NET applications.

How can I generate PDFs in .NET applications?

You can use IronPDF, a comprehensive library for generating, editing, and extracting data from PDF files in .NET applications. It works with various .NET Frameworks, including legacy and latest technologies.

How can I ensure compatibility with .NET Framework 3.5 in my applications?

Using IronPDF can ensure compatibility with the .NET 3.5 Framework, allowing developers to integrate it into existing applications without major code changes or upgrades.

Is my application compatible with .NET 7?

Yes, by using IronPDF, which is updated to ensure compatibility with .NET 7, you can leverage new features and performance improvements for enhanced performance, scalability, and security.

What libraries can I use for Excel and OCR functionalities in .NET?

You can use IronXL for Excel functionalities and IronOCR for advanced OCR capabilities in .NET applications. Both libraries are designed to work with a wide range of .NET frameworks.

Can I integrate Excel and OCR functionalities with .NET 3.5 and .NET 7?

Yes, IronXL and IronOCR are designed to integrate seamlessly with both .NET 3.5 and .NET 7, ensuring maximum compatibility and flexibility for developers.

What are the benefits of using PDF, Excel, and OCR libraries together in .NET?

Together, these libraries provide a robust set of tools for generating reports, invoices, receipts, and extracting data from PDF files, enhancing the functionality and capabilities of .NET applications.

Why is support for legacy frameworks like .NET 3.5 important?

Many applications still rely on .NET 3.5, and supporting it ensures that developers can maintain and upgrade their applications without needing major overhauls.

What is the main advantage of using a library with an intuitive API for PDF manipulation?

Using a library like IronPDF with an intuitive API allows developers to effortlessly create, manipulate, and extract data from PDF documents, streamlining the development process.

Chipego Kalinda

Chat with engineering team now

Software Engineer

Chipego has a natural skill for listening that helps him to comprehend customer issues, and offer intelligent solutions. He joined the Iron Software team in 2023, after studying a Bachelor of Science in Information Technology. IronPDF and IronOCR are the two products Chipego has been focusing on, but his knowledge of all products is growing daily, as he finds new ways to support customers. He enjoys how collaborative life is at Iron Software, with team members from across the company bringing their varied experience to contribute to effective, innovative solutions. When Chipego is away from his desk, he can often be found enjoying a good book or playing football.

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