YTU OJ 3452 C# 问题 E: C#判断回文字符串

YTU OJ 3452 C# 问题 E: C#判断回文字符串

using System;
using System.Text;

namespace text1
{
    
    
    class Program
    {
    
    
        static void Main(String[] args) 
        {
    
    
            Method(Console.ReadLine());
        }
        static string Method(string str)
        {
    
    
            StringBuilder contrarystr=new StringBuilder();
            char[] a = str.ToCharArray();
            for (int i = a.Length-1; i>=0; i--)
            {
    
    //倒序存入StringBuilder类
                contrarystr.Append(a[i]);
            }
            string str1 =contrarystr.ToString();
            if (string.Equals(str, str1) == true)
                Console.WriteLine("yes");
            else
                Console.WriteLine("no");
            return str;
        }
    }
}