Where does DocumentInfo live in the IronPDF API?

DocumentInfo is a class in the PdfToSvg namespace, shipped in IronPdf.dll. It derives from Object and is obtained from the IronPDF document pipeline rather than instantiated directly with new DocumentInfo().

Why are CreationDate and ModDate typed as Nullable ?

The PDF specification makes both date fields optional, and when present they carry timezone offset information. Nullable models both facts: a null value means the field was absent in the document, and a non-null value preserves the full timezone-aware timestamp.

How do you read the title and author of a PDF in C#?

Obtain a DocumentInfo object from the IronPDF document pipeline and read its Title and Author properties. Both are plain strings that map directly to the corresponding PDF information dictionary keys.

What is the difference between Creator and Producer in DocumentInfo?

Creator identifies the application that originally authored the source document, such as a word processor or design tool. Producer identifies the software that wrote or converted the final PDF bytes, such as a PDF library or printer driver.

Class DocumentInfo

Inheritance

System.Object

DocumentInfo

Namespace: PdfToSvg

Assembly: IronPdf.dll

Syntax

public class DocumentInfo : Object

A read-only record of the metadata embedded in a PDF file, DocumentInfo gives every field that PDF producers write into a document's information dictionary: authorship, timestamps, toolchain provenance, and descriptive text. Retrieving this object is the first step whenever a workflow needs to audit, display, or index PDF metadata without opening the full document for rendering.

DocumentInfo surfaces eight properties drawn directly from the PDF information dictionary. The string fields, Author, Creator, Keywords, Producer, Subject, and Title, mirror the standard PDF metadata keys by the same names. Creator records the application that originally created the source document (for example, a word processor), while Producer identifies the software that converted or wrote the PDF bytes. Keywords arrives as a single string whose internal delimiter follows whatever convention the producing tool used, so splitting on commas or semicolons is the caller's responsibility.

The two timestamp properties, CreationDate and ModDate, are typed as Nullable<DateTimeOffset> rather than plain strings. That choice reflects the PDF specification: a document may omit either date entirely, and when present the value carries timezone information. Checking for null before formatting is therefore correct practice, not defensive boilerplate.

All eight properties are read-only. DocumentInfo is a value-carrying record, not a builder, so there are no setters and no constructor to call directly. The object is obtained from the IronPDF conversion pipeline rather than constructed in application code.

using PdfToSvg;

using var doc = PdfDocument.Load("report.pdf");
DocumentInfo info = doc.Info;

Console.WriteLine($"Title:    {info.Title}");
Console.WriteLine($"Author:   {info.Author}");
Console.WriteLine($"Keywords: {info.Keywords}");

if (info.CreationDate.HasValue)
    Console.WriteLine($"Created:  {info.CreationDate.Value:yyyy-MM-dd}");

if (info.ModDate.HasValue)
    Console.WriteLine($"Modified: {info.ModDate.Value:yyyy-MM-dd}");

The IronPDF get-started guide covers initial setup. The PDF metadata how-to explains reading and writing document properties in depth. The PDF to SVG conversion example shows the broader pipeline that surfaces DocumentInfo. Full API documentation is available at the IronPDF docs hub.

Properties

Author

Declaration

public string Author { get; }

Property Value

Type	Description
System.String

CreationDate

Declaration

public Nullable<DateTimeOffset> CreationDate { get; }

Property Value

Type	Description
System.Nullable<System.DateTimeOffset>

Creator

Declaration

public string Creator { get; }

Property Value

Type	Description
System.String

Keywords

Declaration

public string Keywords { get; }

Property Value

Type	Description
System.String

ModDate

Declaration

public Nullable<DateTimeOffset> ModDate { get; }

Property Value

Type	Description
System.Nullable<System.DateTimeOffset>

Producer

Declaration

public string Producer { get; }

Property Value

Type	Description
System.String

Subject

Declaration

public string Subject { get; }

Property Value

Type	Description
System.String

Title

Declaration

public string Title { get; }

Property Value

Type	Description
System.String