The legacy PDFOne.NET NuGet package is now marked deprecated (last release 24.1.60, July 1, 2024), and Gnostice now directs new work to the Gnostice.DocumentStudio.* package family. For teams currently on PDFOne .NET, this is a natural inflection point — a Gnostice-to-Gnostice move to Document Studio is itself a migration, so it is worth re-evaluating the broader PDF library landscape at the same time. PDFOne .NET served as a coordinate-based PDF creation and manipulation library — teams built documents by specifying exact positions, drawing text blocks, and manually calculating layouts. IronPDF takes a fundamentally different approach: HTML and CSS define document structure, with a Chrome rendering engine handling layout calculations automatically. This architectural distinction affects development velocity, maintenance overhead, and the types of documents each library handles efficiently.…