将list <int>转换为list <long> </long> </int>

Question

如何在C＃中将List<int>转换为List<long>？

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();

Answer 3

var longs = ints.Cast<long>().ToList();