how to make a string palindrome in c# code example

Example: palindrom checker C#

static void Main(string[] args)  
{  
    string _inputstr, _reversestr = string.Empty;  
    Console.Write("Enter a string : ");  
    _inputstr = Console.ReadLine();  
    if (_inputstr != null)  
    {  
        for (int i = _inputstr.Length - 1; i >= 0; i--)  
        {  
            _reversestr += _inputstr[i].ToString();  
        }  
        if (_reversestr == _inputstr)  
        {  
            Console.WriteLine("String is Palindrome Input = {0} and Output= {1}", _inputstr, _reversestr);  
        }  
        else  
        {  
            Console.WriteLine("String is not Palindrome Input = {0} and Output= {1}", _inputstr, _reversestr);  
        }  
    }  
    Console.ReadLine();  
}