c#Reverse字符串

class Program
{
static void Main(string[] args)
{
// 输出 ypoc si yek eht
string str = "the key is copy";
char[] arr = str.ToCharArray();
Array.Reverse(arr);
var result = new string(arr);
//输出 copy is key the
string[] ss = str.Split(new string[] { " " }, StringSplitOptions.None);
var resilt = ss.Reverse();
var temp = String.Join(" ", resilt);

Console.WriteLine(temp);
Console.ReadKey();
}
}