// C# program for Fibonacci Series

// using Recursion

using System;

public class GFG

{

    public static int Fib(int n)

    {

        if (n <= 1)

        {

            return n;

        }

        else

        {

            return Fib(n - 1) + Fib(n - 2);

        }

    }

    // driver code

    public static void Main(string[] args)

    {

        int n = 9;

        Console.Write(Fib(n));

    }

}

​