Palindrome using stack, C#

Palindrome using stack

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Stack<char> cstack = new Stack<char>();
            string input = "MALAYALAM";

var inputToUpper = input.ToUpper(); /*assuming case senstivity is not to be considered */

foreach (char c in inputToUpper)
            {
                cstack.Push(c);
            }

bool isPalindrome = true;
            var noOfItems = cstack.Count;

for(int i=0; i< noOfItems ; i++)
            {
                if (inputToUpper[i] != cstack.Pop())
                {
                    isPalindrome = false; break;
                }
            }

if (isPalindrome)
            {
                Console.WriteLine("Palindrome");
            }
            else
            {
                Console.WriteLine("Non Palindrome");
            }
        }
    }
}


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