This example demonstrates how to programmatically add a background image stamp to all pages of a PDF document using Aspose.PDF for .NET. Background image stamps are useful for adding watermarks, logos, or overlays that should not obscure the original content. By setting the stamp as background and adjusting opacity, the result is a professional, non-intrusive visual enhancement.

Steps to Add a Background Image Stamp to PDF Pages using C#

1. Verify that the input PDF and stamp image files exist to avoid runtime errors.
2. Load the source PDF document using the Document constructor within a using block for proper disposal.
3. Create an ImageStamp object by passing the path to the stamp image file.
4. Set the Background property of the ImageStamp to true to ensure it appears behind the page content.
5. Optionally configure alignment, opacity, and other visual properties for the stamp.
6. Iterate through all pages in the document and apply the stamp using Page.AddStamp.
7. Save the modified PDF document to a new file using Document.Save.

The steps above ensure safe file handling, correct stamp configuration, and reliable application across all pages.

Code to Add a Background Image Stamp to PDF Pages using C#

This example demonstrates how to use Aspose.PDF for .NET to overlay a semi-transparent background image stamp on every page of a PDF, preserving readability while adding visual branding or annotations.