This example demonstrates how to add custom metadata to an existing PDF document using C# and Aspose.PDF for .NET. Custom metadata allows you to embed application-specific information—such as project codes, version numbers, or internal identifiers—directly into the PDF, making document management and automation more robust.

Steps to Add Custom Metadata to PDF using C#

1. Load the existing PDF file using the PdfFileInfo class from the Aspose.Pdf.Facades namespace
2. Call the SetMetaInfo method with a custom key (e.g., ‘ProjectCode’) and its value to add metadata
3. Verify the file path for the output PDF to avoid overwriting the original
4. Invoke SaveNewInfo with the output path to persist the updated metadata to disk
5. Check the boolean return value of SaveNewInfo to confirm successful metadata update

The code loads the PDF, appends a custom key-value pair to its metadata, and saves the result as a new file. This approach is ideal for integrating PDFs into enterprise workflows where metadata-driven indexing or filtering is required.

Code to Add Custom Metadata to PDF using C#

The example illustrates how easily custom metadata can be embedded into PDFs using Aspose.PDF for .NET, enabling better document traceability and automation.