SEO is a combination of numerous efforts, both on and off site. The question of 'is ASP SEO friendly' is on the same lines of 'SEO friendly web hosting'.

In other words, they have very little to do with SEO as a whole. Yes, ASP may mean friendly URL's might be harder (comparing IIS to Apache), but it's just a drop in the SEO ocean.

Content, backlinks and marketing awareness are of far greater importance than your programming language. If you are unsure on the techniques of SEO, you might want to consult this basic guide first.