using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        string str = "Hari";      

        char[] charArray = str.ToCharArray();  

     for (int i = 0, j = str.Length - 1; i < j; i++, j--)  

      {  

        charArray[i] = str[j];           

        charArray[j] = str[i];  

    }  

    string reversedstring = new string(charArray);  

    Console.WriteLine(reversedstring);  

        Console.WriteLine(reversedstring);  

​

    }

}

​

​