Display a String in Reverse Using Recursion in C#

 using System;

namespace Reverse
{
class Program
{
public static void Main()
{
string str = "this is a test";
Reverse rsObj = new Reverse();
Console.WriteLine("Original string: " + str);
Console.Write("Reversed string: ");
rsObj.displayReverse(str);
Console.ReadKey();
}
}
class Reverse
{
public void displayReverse(string str)
{
if (str.Length > 0)
displayReverse(str.Substring(1, str.Length - 1));
else
return;
Console.Write(str[0]);
}
}
}