Currently we have Sitefinity 3.5 version and would like to upgrade to the latest version 7. Let me know the feasibility, challenges in migrating from 3.5 to 7 or is it better to rewrite the code.
Thanks and Regards
First of all you would have to take the 3.5 up to 3.7 SP4 before even considering upgrading/updating to 7.0
As of its better to rewrite depends on much different things. Once in a while I think its better to start of fresh and lose some balast on the way.