How to generate a PDF?

Question

For my Microsoft Surface application I'd like to generate a PDF including some images. How should I start to do that?

EDIT: I don't want to convert a text or html document, but I want to create a pdf from scratch.

Answer 1

PDFsharp is nice, free, relatively easy to use and compatible with WPF

Answer 2

Two basic options:

1. use a PDF specific library, like iText in @Kent's answer
2. install a PDF printer and use any reporting/printing code.

Option 1) will be the most flexible and efficient way.
Option 2) is interesting when you already have code that prints what you want. It is a bit of a hassle to manage the output-file etc. It's very easy to support XPS as well.