Check String is Palindrom

Definition
  A palindrome is a word or sentence that reads the same forward as it does backward. 

Source Code:

    string str, rever = "";
    int length;
    Console.WriteLine("Enter String to check for Palindrom: ");
    str = Console.ReadLine();
    for (length = str.Length - 1; length >= 0; length--)
    {
        rever = rever + str[length];

    }

    Console.WriteLine(rever.ToString());
    Console.ReadLine();
    if (rever.ToString() == str.ToString())
    {
        Console.WriteLine("String is a Palindrom");
        Console.ReadLine();
    }
    else
    {
        Console.WriteLine("String is not a Palindrom");
        Console.ReadLine();
    }

Output: