The Palindromes are numbers that read the same forward as backward. For example, 5885, 78587, 32823 and etc...

C# program to check a Number is Palindrome or Not:

using System;

namespace PalindromeCheck
{
    class Program
    {
        static void Main(string[] args)
        {
            // Declaration
            var sum = 0;
            // Get input parameter
            Console.Write("Enter the Number: ");
            var input = int.Parse(Console.ReadLine());
            // Assign the value to temp variable
            var temp = input;
            // Logic to check the number is Palindrome or not
            while (temp > 0)
            {
                var r = temp % 10;
                sum = (sum * 10) + r;
                temp = temp / 10;
            }
            if (input == sum)
                Console.Write("Number is Palindrome.");
            else
                Console.Write("Number is not Palindrome");
            Console.ReadKey();
        }
    }
}

Output:

Enter the Number: 5885
Number is Palindrome.

Enter the Number: 1235
Number is not Palindrome