PDFSharp - Create and process PDF in .NET

PDFsharp is the Open Source .NET library that easily creates and processes PDF documents on the fly from any .NET language. The same drawing routines can be used to create PDF documents, draw on the screen, or send output to any printer. Neither Adobe's PDF Library nor Acrobat are required. Its features include:

• Creates PDF documents on the fly from any .NET language<1/li>
• Easy to understand object model to compose documents
• One source code for drawing on a PDF page as well as in a window or on the printer
• Modify, merge, and split existing PDF files
• Images with transparency (color mask, monochrome mask, alpha mask)
• Newly designed from scratch and written entirely in C#
• The graphical classes go well with .NET