TIFF to PDF conversion

Q: I’m currently in need of either a .NET SDK, or a Windows-compatible
command-line utility, for converting TIFF files into PDF files.
Support for other image file formats might come along down the road.

Given the above, your PDF2Image command line utility (http://
www.pdftron.com/pdf2image) sounds almost exactly like what I need;
except in reverse. Does that utility strictly take PDF as input, with
the ability to produce TIFF (among other) files as output? Or can the
program also perform the reverse conversion (image file as input, PDF
file as output). If not, do you offer a different command-line
utility that does?

If you don’t offer a PDF2Image-like utility for doing an image-to-PDF
file conversion, I’m assuming the PDFNet SDK would allow me to write
my own conversion utility. In my case, I’d be interested in the .NET
variation of the SDK. Is that a correct assumption? If so, do any of
the samples on this page:

happen to demonstrate how that conversion is best performed?
A: You could use PDFNet SDK (http://www.pdftron.com/net) to add TIFF
and other image files into new (or existing) PDF files.

As a starting point you may want to take a look at the following
samples (C# or VB):

AddImage: http://www.pdftron.com/net/samplecode.html
ElementBuilder: http://www.pdftron.com/net/samplecode.html