using System;

public class Program

{

    public static void Main()

    {

        StingPalindrome obj = new StingPalindrome();

        var result = obj.CheckStringPalindrome("rdr");

        Console.WriteLine("Hello World"+ result);

    }

}

​

public class StingPalindrome

{

    public bool CheckStringPalindrome(string s1)

    {

        int min = 0;

        int max= s1.Length -1;

        s1 = s1.ToLower().Trim(); 

        while(max >= 0)

        {

            if(s1[min] == s1[max])

               {

                   min++;

                   max++;

               }

               else 

               {

                    return false;

               }        

        }

        return true;

    }

}