C# - List - remove all elements but NOT the first four

Question

I have a list of elements, however if the number of list elements is greater than 4 I want to remove all elements but leave the first 4 only in the list.

Example:

List<> - 1, 2, 3, 4, 5, 6, 7, 8

The new list should be - 1,2,3,4

I am looking at using List.RemoveAll() but not sure what to put in the parentheses

Looking forward to some help ....

Steven

Answer 1

Why not use List.RemoveRange:

if (list.Count > 4)
{
    list.RemoveRange(4, list.Count - 4);
}

(That's assuming you want to mutate the existing list. If you're happy creating a new sequence, I'd definitely use list.Take(4) as per Adam's suggestion, with or without the ToList call. These days I tend to build queries rather than mutating existing collections.)