Question

I have a List<B> and class B has a public property A.

How can I filter the list of B using a Predicate<A>?

Answer 1

If your list is named myList and your predicate myPredicate, then you want probably something like this:

var result = myList.Where(b => myPredicate(b.A))

or you can use a lambda expression, e.g.:

var result = myList.Where(b => b.A < 10)

or something like this, where the predicate would be b.A < 10.

Maybe you should give us a more complete code sample.