C # programme to print the fibonacci series

In case of fibonacci series, The next printed number is the sum of previous two numbers like 0,1,1,2,3,5,8,13,21 etc. The first two numbers of fibonacci series are 0 and 1.

using System;

namespace Fibonacci_series
{
    class Program
    {
        static void Main(string[] args)
        {
            
            Console.WriteLine("Enter Your target number");
            int Target_Number = Convert.ToInt32(Console.ReadLine());
            int First_Number = 0;
            int Second_Number = 1;
            int sum;
            Console.Write(+First_Number+" "+Second_Number);//print 0 and 1
            for (int i = 2; i < Target_Number; i++)//loop starts from 2 because 0 and 1 already printed
            {
                sum = First_Number + Second_Number;
                First_Number = Second_Number;
                Second_Number = sum;
                Console.Write(" " + sum);
            }
                Console.WriteLine();
        }
    }
}


OutPut:-
                     

Fibonacci Series