work with vector graphic and PDF (c#)

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C#

PDF

graphics

Hi,
I have done a project that do this stuff:
load an img (png) write text to it (raster) then save the img in a pdf (i.e.: 2 / 4 img/page)

I want to do the same thing with vector graphic (SVG or other format, the more the better)

I don't know where to start. A lot of tutorial explain how to add shapes, but not how to manage already done images.

I need the job to be made in the fastest way (no raster conversion, the pdf should embed the vector graphic).

Thank you!