[LeetCode]9. Palindromes thirty-two

Determine whether an integer is a palindrome . Palindrome number refers to positive order （ From left to right ） Reverse order （ From right to left ） Read all the same integers .

Example 1:

Input : 121
Output : true
Example  2:

Input : -121
Output : false
explain : Read left to right , by -121 . Read right to left , by 121- . So it's not a palindrome number .
Example 3:

Input : 10
Output : false
explain : Read right to left , by 01 . So it's not a palindrome number .
Advanced :

Can you solve this problem without converting integers into strings ？

source ： Power button （LeetCode）
link ：https://leetcode-cn.com/problems/palindrome-number
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public class Solution
{
    
    public bool IsPalindrome(int x)
    {
    
        if (x < 0)
        {
    
            return false;
        }
        var str = x.ToString().ToCharArray();
        Array.Reverse(str);

        var res = string.Join("", str);

        return x.ToString().Equals(res);
    }
}