Delete list contents from another list

Question

How to remove the contents of one list from another list?

Answer 1

list1.RemoveAll(i => list2.Contains(i));

Answer 2

List<object> result = anotherlist.Except(list).ToList();

Answer 3

Here's a quick summary and tip by James post.

If you use List<T>, but myOtherListcontains many elements, you must convert it to Hashset<T> var set = new Hashset(myOtherList), so its solution should be much faster.