Fibonacci Series using C#

The Fibonacci sequence is a series of numbers where a number is found by adding up the two numbers before it. Starting with 0 and 1, the sequence goes 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so forth. Written as a rule, the expression is xn = xn-1 + xn-2.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace FibonaciDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            int i, count, f1 = 0, f2 = 1, f3 = 0;
            Console.Write("Enter the Limit : ");
            count = int.Parse(Console.ReadLine());
            Console.WriteLine(f1);
            Console.WriteLine(f2);
            for (i = 0; i <= count; i++)
            {
                f3 = f1 + f2;
                Console.WriteLine(f3);
                f1 = f2;
                f2 = f3;
            }
            Console.ReadLine();
 
        }
    }
}