| Nilart |
Necromancy is not inherently evil. Spells with the [evil] descriptor are inherently evil. Will casting spells with this descriptor cause a change in alignment?
Not if they are used with prudence.
I am not a writer for pathfinder so everything from here on out is just my opinions.
With your example, Raise Undead, the spell is evil because you are bringing evil creatures into existence. Now, you may be doing this for the "right reasons". Good for you. But what if something goes awry and you loose control of them? Can you guarantee your own safety - that you will not fall unconscious, have to summon some different type and therefore loose control of some zombies, etc.?
And that is why I say it is evil. You could very easily be knowingly releasing an evil creature into the world, no matter what your original intentions are. Will this cause an alignment shift? Not done once or twice but if it becomes "habit"... it's up to the DM but I would venture there is a chance.
P.S. I Agree with all the above posts that say to play it however you/your DM see fit.