remove from List using Linq

Question

So, I have a List of objects of class A that contains a List of objects of class B

class A 
{
  ...
  List<B> bs;
}

and I have lists:

List<A> mainList;
List<B> listForRemoval;

How can I, using Linq, "clean" mainList, by removing all objects from bs (for every A in mainList) that exists in listForRemoval?

I hope I didn't confuse you with this question. :)

Answer 1

linq itself is probably not a great fit, but you can use some of it's extension methods. Linq typically is mostly for selection, not processing.

mainList.ForEach(x=>x.bs = x.bs.Where(y=>!listForRemoval.Contains(y)).ToList());