Why this program won't run on visualstudio ConsoleApp ?

Question

this program is for question 2 in the"Method" " Optional & Named Arguments "
and it don't work on visual studio
why ?
static int calc(int from, int to, int step = 1)
{
int res = 0;
for (int i = from; i < to; i += step)
{
res += i;
}
return res;
}
static void Main(string[] args)
{
int res = calc(step: 2, to: 99, from: 5);
Console.WriteLine(res);
}

Answer 1

I'm using VS 2017 and I just ran the code without any problems
But I don't think VS version is the problem.
Your code on VS any version should look something like this:
using System;
namespace ConsoleApp1
{
class Program
{
static int Calc(int from, int to, int step = 1)
{
int res = 0;
for (int i = from; i < to; i += step)
{
res += i;
}
return res;
}
static void Main(string[] args)
{
int res = Calc(step: 2, to: 99, from: 5);
Console.WriteLine(res);
}
}
}

Answer 2

thanks a lot
yes your true , i'm forget some code

Answer 3

You are welcome
Good luck with your coding!