using System;

​

public class Program

{

    public void reverseString(char[] s)

    {

        //using sorting to reverse a string

        int n = s.Length;

        for (int i = 0; i < n / 2; i++)

        {

            var temp = s[i];

            s[i] = s[n - i - 1];

            s[n - i - 1] = temp;

        }

    }

​

    public static void Main()

    {

        char[] s = {'h', 'e', 'l', 'l', 'o'};

        Program p = new Program();

        p.reverseString(s);

        Console.Write("Reversed String:");

        Console.Write(s);

    }

}