Wikipedia tells me that .NET 1.0 was released in February 2002, 8.5 years ago. Good to see recruitment companies and HR depts have such realistic requirements. (Still, at least they aren't asking for anyone with 10+ years experience)
I rarely take a .NET contract. But what I can say is 1) They always pay my highest rates. 2) Generally it's a bad / scary experience in comparison to python or Clojure (where I do the majority of my work and contracting).
They could be looking for developers with 8-10 years of experience as developers but who also know .NET.
http://seeker.dice.com/jobsearch/servlet/JobSearch?op=302...