Illustrator :: Programmatically Convert PDF To SVG?

I would want to use AI to convert PDF containing image and vectors to SVG. Using interface, it is working very well.
 
So now I want to include this operation in an existing application developed in .NET so that I can automate this transformation.
 
I have written this piece of code:
  
Illustrator.Application aiApp = new Illustrator.Application();
Document aiDoc = aiApp.Open(pdfFileName);
ExportOptionsSVG options = new ExportOptionsSVG();