---
title: "PdfRadioButtonField"
canonical_url: "https://www.nutrient.io/api/csharp/editors/pdf/formfields/pdf-radio-button-field/"
md_url: "https://www.nutrient.io/api/csharp/editors/pdf/formfields/pdf-radio-button-field.md"
last_updated: "2026-10-08T08:55:57.709Z"
description: "Represents a radio button form field in a PDF document. Radio buttons are part of a mutually exclusive group where only one option can be selected."
---

Represents a radio button form field in a PDF document. Radio buttons are part of a mutually exclusive group where only one option can be selected.

```csharp

using Nutrient;

```

**Inherits from:** [`PdfFormField`](/api/csharp/editors/pdf/formfields/pdf-form-field/)

The SDK creates this class through factory methods or other SDK objects.

## Properties

### HasSelection

```csharp

public bool HasSelection { get; }

```

Whether any option is currently selected.

**Type:** `bool`

### OptionCount

```csharp

public int OptionCount { get; }

```

The number of options (radio buttons) in this group.

**Type:** `int`

### SelectedOption

```csharp

public string SelectedOption { get; set; }

```

The currently selected option value. Set to "Off" to deselect all options.

**Type:** `string`

## Resource management

```csharp

public void Dispose()

```

`PdfRadioButtonField` implements `IDisposable`. Call `Dispose()` or use a C# `using` declaration to release its native handle right away. If you don't, the handle is released when the object is garbage collected.

---

## Related pages

- [Formfields](/api/csharp/editors/pdf/formfields.md)
- [Pdf Check Box Field](/api/csharp/editors/pdf/formfields/pdf-check-box-field.md)
- [Pdf Combo Box Field](/api/csharp/editors/pdf/formfields/pdf-combo-box-field.md)
- [Pdf Form Field Collection](/api/csharp/editors/pdf/formfields/pdf-form-field-collection.md)
- [Pdf Form Field](/api/csharp/editors/pdf/formfields/pdf-form-field.md)
- [Pdf List Box Field](/api/csharp/editors/pdf/formfields/pdf-list-box-field.md)
- [Pdf Push Button Field](/api/csharp/editors/pdf/formfields/pdf-push-button-field.md)
- [Pdf Signature Field](/api/csharp/editors/pdf/formfields/pdf-signature-field.md)
- [Pdf Text Field](/api/csharp/editors/pdf/formfields/pdf-text-field.md)