Jeremy, there is no need to delete it... it will be deleted once it goes out of scope and is no longer referenced. so in your example, you just create the new particle and it will be cleaned up just like an int would be in B3D.... ie: don't worry about it.
with that said, there are a few times when you do have to clean up after yourself.... in those cases (cyclic references) just null them and you will be fine.
with that said, there are a few times when you do have to clean up after yourself.... in those cases (cyclic references) just null them and you will be fine.