I need to convert an XPS file I create with my application to a PDF file, what is the best way to do so? I prefer this to be done from inside C# using a managed assembly.
Open source is preferred upon third party solutions
You can use the XpsDocument class to read the XPS files, then use a PDF library (such as Report.Net or #PDF) to export it. I used #PDF back in .NET 1.1, but not sure if it can be easily converted to .NET 2.0.
#PDF: http://sharppdf.sourceforge.net/
Report.NET: http://report.sourceforge.net/
An open source managed assembly might be hard to find, but you can look at tallcomponents.com for a commercial product that might help, You can have a look at GhostScript.com, its open source and supports both XPS and PDF, although you may have issues redistributing it without a license.
Although it is not free, Amyuni PDF Creator .Net supports loading XPS files and saving them as PDF.
Usual disclaimer applies.
来源：https://stackoverflow.com/questions/6395874/convert-xps-to-pdf-in-wpf-c-sharp-application