C# Map function for Generic Lists

I whipped up a quick map function for applying a modifying function to all items in a list, and potentially changing the type of each item:

public static class ListMap
    {
        public static List Map(List list, Func mapFunction)
        {
            if (list == null)
            {
                throw new ArgumentNullException("list");
            }

            if (mapFunction == null)
            {
                throw new ArgumentNullException("mapFunction");
            }

            List outputList = new List();
            list.ForEach(t => outputList.Add(mapFunction(t)));
            return outputList;
        }
    }

Usage:

List stringList = new List(new string[] { "1", "2", "3" });
List result = ListMap.Map(stringList, x => int.Parse(x));

This results in a List containing {1, 2, 3}.