---
title: "Add PDF functionality with Nutrient.SDK (C#)"
canonical_url: "https://www.nutrient.io/sdk/dotnet/getting-started/csharp/"
md_url: "https://www.nutrient.io/sdk/dotnet/getting-started/csharp.md"
last_updated: "2026-10-08T14:16:38.424Z"
description: "Integrate the Nutrient.SDK package into a .NET 10 app: install the NuGet package, register a license key, and convert a document to PDF."
---

# Add PDF functionality with Nutrient.SDK (C#)

The `Nutrient.SDK` package processes PDF, Office, and image documents in.NET applications. Use it to convert documents, edit PDFs, extract text and structured data, and run OCR.

Not sure whether `Nutrient.SDK` or `GdPicture.API` fits your project? See the package comparison in the overview.

[Learn more](https://www.nutrient.io/guides/dotnet/csharp.md)

## Requirements

-.NET 10

- Windows x64 or ARM64

- macOS on Apple Silicon (ARM64)

- Linux x64 or ARM64

## Install

Add the package to a.NET 10 project:

```bash

dotnet add package Nutrient.SDK

```

The package brings in the native runtime packages it needs through NuGet dependencies. You don't need to add a runtime package directly.

NuGet package: [https://www.nuget.org/packages/Nutrient.SDK](https://www.nuget.org/packages/Nutrient.SDK)

## Register your license key

For licensed use, register your license key before you open a document:

```csharp

using Nutrient;

License.RegisterKey("YOUR_LICENSE_KEY");

```

Your Nutrient.NET SDK license key is valid for both the `Nutrient.SDK` and `GdPicture.API` packages. Without a key, the SDK runs in evaluation mode under the [evaluation license agreement](https://www.nutrient.io/legal/Nutrient_SDK_User_Evaluation_Subscription_Agreement).

## Convert a document to PDF

Place an `input.docx` file in the application's working directory, then run:

```csharp

using Nutrient;

using Document document = Document.Open("input.docx");
document.ExportAsPdf("output.pdf");

```

## What you can do

- Convert PDF, Office, and image documents

- Edit PDFs, annotations, and form fields

- Extract text and structured data

- Run OCR on scanned documents

- Export documents as PDF, images, HTML, or Markdown

- Apply digital signatures

## Next steps

- [Nutrient.SDK overview and package comparison](/guides/dotnet/csharp.md)

- [Nutrient.SDK API reference](/api/csharp.md)

- [Nutrient.SDK changelog](/guides/dotnet/csharp/changelog.md)

- Support: [https://support.nutrient.io/](https://support.nutrient.io/)

---

## Related pages

- [Getting started with Nutrient .NET SDK](/sdk/dotnet/getting-started.md)
- [Add PDF functionality with Delphi and C++ Builder](/sdk/dotnet/getting-started/com-activex-delphi-cplus-builder.md)
- [Add PDF functionality with Microsoft Access](/sdk/dotnet/getting-started/com-activex-microsoft-access.md)
- [Add PDF functionality with Visual Basic](/sdk/dotnet/getting-started/com-activex-visual-basic.md)
- [Add PDF functionality with Visual C++ with MFC](/sdk/dotnet/getting-started/com-activex-visual-cplus-with-mfc.md)
- [Add PDF functionality with Visual FoxPro](/sdk/dotnet/getting-started/com-activex-visual-foxpro.md)
- [Add PDF functionality with .NET](/sdk/dotnet/getting-started/integrate.md)
- [Add PDF functionality with WinForms](/sdk/dotnet/getting-started/winforms.md)
- [Add PDF functionality with WPF](/sdk/dotnet/getting-started/wpf.md)