using System;

​

namespace FibonacciSeries

{

    public class Program

    {

        public void Main(string[] args)

        {

            Console.WriteLine("Following is the first 12 integers in a Fibonacci series");

            Console.Write(1 + "," + 1 + ",");

            int prev1 = 1, prev2 = 1, next;

            for (int i = 1; i <= 10; i++)

            {

                next = prev1 + prev2;

                Console.Write(next + ",");

                prev1 = prev2;

                prev2 = next;

            }

        }

    } 

}

​