C# List和List互相转换

1   List<string> 转 List<int>

var strList = new List<string>{"1","2","3"};
var intList = strList.Select<string,int>(x =>Convert.ToInt32(x));

2   List<int> 转 List<string>

List<int> intList = new List<int> { 1,2,3 };
List<string> strList = intList.ConvertAll<string>(x => x.ToString());

3  List<string> 转 List<long>

1 var strList = new List<string>{"1","2","3"};
2 var longList = strList.Select<string,long>(x =>Convert.ToInt64(x));