Fibonacci Series Program using Recursion in C#

Fibonacci Series Program using Recursion Code:

using System;
using System.Text;
using System.Collections;
using System.Data;
namespace Console_App
{
    public class clsFactorial
    {      
        public static void Main()
        {
            try
            {
                for(int i=1; i<=10;i++)
                Console.WriteLine("Fibonacci no. = {0}", fibonacci(i));                   
            }
            catch(Exception ex)
            {
                //handle exception here
            }
            Console.ReadLine();           
        }

        static int fibonacci(int x)
        {          
            if (x <= 1)
            {
                return 1;
            }
            return fibonacci(x - 1) + fibonacci(x - 2);   
        }
    }
}