C#List<string>和string[]之间的相互转换

            List<System.String> List = new List<System.String>();
            string[] str={"1","2","3"};
            List = new List<System.String>(str);

            List<System.String> List = new List<System.String>();
            List.Add("1");
            List.Add("2");
            List.Add("3");
            System.String[] str = { };
            str = List.ToArray();