印出1到5累加結果(用FOR)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace C_Sharp空白練習檔
{
    class Program
    {
        static void Main(string[] args)
        {
            Calculator c = new Calculator();
            int result = c.SumFrom1ToX(5);
            Console.WriteLine(result);
        }
    }
    class Calculator
    {
        public int SumFrom1ToX(int x)
        {
            int result = 0;
            for (int i = 1; i <=x; i++)
            {
                result = result + i;
            }
            return result;
        }

    }

}