将list <int>转换为list <long>

Question

如何转换List<int>为List<long>C#？

Answer 1

像这样:

List<long> longs = ints.ConvertAll(i => (long)i);

这使用C#3.0 lambda表达式; 如果您在VS 2005中使用C#2.0,则需要编写

List<long> longs = ints.ConvertAll<int, long>(
    delegate(int i) { return (long)i; }
);

Answer 2

List<int> ints = new List<int>();
List<long> longs = ints.Select(i => (long)i).ToList();