PDFsharp is an open-source library that creates, modifies, merges, and splits PDF documents.

What is PDFsharp?
Features
Reference
Samples
FAQ

What is MigraDoc?
Working with MigraDoc

PDFsharp project homepage
PDFsharp project at sourceforge.net Go here to download the latest version of PDFsharp and MigraDoc
PDFsharp forum Go here to get support, report bugs, or request features.