PDFsharp

PDFsharp is a C# library that easily creates PDF documents on the fly. The same GDI+ like drawing routines can be used to create PDF documents, draw on the screen, or send output to any printer. PDFsharp can also modify, merge, and split existing PDF files or incorporate pages from existing PDF files into new PDF documents.
Category	PDF Libraries
License	GNU Library or Lesser General Public License (LGPL)
HomePage	http://www.pdfsharp.com