Which namespace and assembly contain PdfSignatureImage?

PdfSignatureImage is in the IronPdf.Signing namespace, shipped in IronPdf.dll.

What is the PdfSignatureImage class used for in C#?

PdfSignatureImage is the IronPDF class that PDF digital signature image. It is part of the IronPdf.Signing namespace and is used through the IronPDF C# API.

What are the key properties of PdfSignatureImage?

Properties commonly used on PdfSignatureImage include Image, PageIndex, Rectangle. Each property configures one aspect of the PDF signing surface exposed by the class.

How do you create a PdfSignatureImage in C#?

Instantiate PdfSignatureImage directly with one of its constructors, or obtain it from the relevant IronPDF API entry point. The class supports the standard C# new expression where a constructor is defined.

Class PdfSignatureImage

PDF digital signature image

Inheritance

System.Object

PdfSignatureImage

Namespace: IronPdf.Signing

Assembly: IronPdf.dll

Syntax

public class PdfSignatureImage : Object

PdfSignatureImage is what IronPDF C# code uses for PDF signing. It represents PDF digital signature image.

PdfSignatureImage matters when an application needs to configure or invoke PDF signing from C# code. The class encapsulates the related options and behavior in a single object that is set up once and reused across render or processing calls. Typical scenarios include batch generation pipelines, templated document workflows, and integration with existing C# document services.

To use PdfSignatureImage, instantiate or obtain it from the relevant entry point in the IronPDF C# API. Key properties include Image, PageIndex, Rectangle. Assign options or invoke methods on the instance to configure or perform the operation. The image to PDF covers typical usage in C# end to end.

using IronPdf;

// Obtain PdfSignatureImage from the relevant entry point in the IronPDF API
void Configure(PdfSignatureImage instance)
{
    var current = instance.Image;
}

For the broader workflow, see the PDF image flatten csharp guide in the IronPDF C# documentation. For broader context, the PDF signing portion of the IronPDF C# API contains related types that work with PdfSignatureImage directly. PdfSignatureImage exposes additional members beyond those highlighted above; the reference tables on this page list the full set. In application code, treat PdfSignatureImage as a configured object that is constructed once and reused across operations rather than instantiated per call. Configuration is generally idempotent: assigning the same property value twice has the same effect as assigning it once. For diagnostic purposes, inspect the relevant PdfSignatureImage property after each operation to confirm the configured state. See the constructors, properties, and methods tables below for the complete API surface of PdfSignatureImage. Application code typically obtains or instantiates a single PdfSignatureImage and shares it across multiple IronPDF operations rather than recreating it per call.

Constructors

PdfSignatureImage(AnyBitmap, Int32, Rectangle)

Create a new signature image using the specified parameters

Declaration

public PdfSignatureImage(AnyBitmap bitmap, int page_index, Rectangle rectangle)

Parameters

Type	Name	Description
IronSoftware.Drawing.AnyBitmap	bitmap	Image
System.Int32	page_index	Page index
IronSoftware.Drawing.Rectangle	rectangle	Rectangle

PdfSignatureImage(Byte[], Int32, Rectangle)

Create a new signature image using the specified parameters

Declaration

public PdfSignatureImage(byte[] bytes, int page_index, Rectangle rectangle)

Parameters

Type	Name	Description
System.Byte[]	bytes	Image bytes
System.Int32	page_index	Page index
IronSoftware.Drawing.Rectangle	rectangle	Rectangle

PdfSignatureImage(String, Int32, Rectangle)

Create a new signature image using the specified parameters

Declaration

public PdfSignatureImage(string path, int pageIndex, Rectangle rectangle)

Parameters

Type	Name	Description
System.String	path	Image path
System.Int32	pageIndex	Page index
IronSoftware.Drawing.Rectangle	rectangle	Rectangle

Properties

Image

Signature image

Declaration

public AnyBitmap Image { get; set; }

Property Value

Type	Description
IronSoftware.Drawing.AnyBitmap

PageIndex

Page index where image will be visible

Declaration

public int PageIndex { get; set; }

Property Value

Type	Description
System.Int32

Rectangle

Image location

Declaration

public Rectangle Rectangle { get; set; }

Property Value

Type	Description
IronSoftware.Drawing.Rectangle