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();